Sin 135 degrees

Mar 26, 2016 · Rewrite the angle, using the special angles from right triangles. One way to rewrite 135 degrees is 90 degrees + 45 degrees. Choose the appropriate sum or difference formula. Plug the information you know into the formula. Therefore, a = 90 degrees and b = 45 degrees. Use the unit circle to look up the sine and cosine values you need.

Trigonometry questions and answers. Find the exact values of the cosine and sine of this angle. Then find the decimal values. Angle = 135 degrees cos135 degrees = ? Simplify answer , including any radicals. Use integers or fraction for any numbers sin 135 degrees=? cos135 degrees ( round to nearest hundredth as needed in decimal) sin 135 ...Trigonometry. Find the Reference Angle sin (135) sin(135) sin ( 135) Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. sin(45) sin ( 45) The exact value of sin(45) sin ( 45) is √2 2 2 2. √2 2 2 2. The result can be shown in multiple forms. Exact Form:Since A = 28 and B = 44.8, angle Cis 107.2 degrees 16.8 135.2 Case 2: One of the given sides is the largest.. The missing side is the largest.. Remember, sin- (.704) has another answer in quadrant Il (where sine is also positive!) sin- (.704) = 135.2 sin(135.2) = .704 Assuming the missing angle B is 135.2, and angle A is 28, angle Cis 16.8 degrees!sin 45° = √ (2)/2. sin 45 degrees = √ (2)/2. The sin of 45 degrees is √ (2)/2, the same as sin of 45 degrees in radians. To obtain 45 degrees in radian multiply 45° by π / 180° = 1/4 π. Sin 45degrees = sin (1/4 × π). Our results of sin45° have been rounded to five decimal places. If you want sine 45° with higher accuracy, then ...Find the Value Using the Unit Circle 135 degrees. Step 1. Evaluate. Tap for more steps... Step 1.1. Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because cosine is negative in the second quadrant. Step 1.2. The exact value of is . Step 2.90 ∘ is equivalent to π 2 radians. This also means we can use radian measures to calculate arc lengths and sector areas just like we can with degree measures: central angle 2 π = arc length circumference = sector area circle area. Example: In a circle with center O , central angle A O B has a measure of 2 π 3 radians.

Simplify sin(135 degrees ) Step 1. Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Step 2. The exact value of is . Step 3. The result can be shown in multiple forms. Exact Form: Decimal Form: ...To understand the sine of 300 degrees on the unit circle, let's draw a unit circle and mark the angle 3 5 π radians, which is equivalent to 300 degrees. In the unit circle above, we can see that the angle 3 5 π radians (or 300 degrees) corresponds to a point P on the circle.Find the Exact Value sin(210) Step 1. Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because sine is negative in the third quadrant. Step 2. The exact value of is . Step 3. The result can be shown in multiple forms.It is the complement to the sine. In the illustration below, cos(α) = b/c and cos(β) = a/c. ... Our cosine calculator supports input in both degrees and radians, so once you have measured the angle, or looked up the plan or schematic, you just input the measurement and press "calculate". ... 135° 3π/4-0.707107: 150° ...To find the exact value of cos(135) and sin(135), we need to use the unit circle and refer to the special angles. ... The reference angle for 135 degrees is 45 degrees, and sin(45) = 1/sqrt(2) or approximately 0.7071. Since sin is positive in the second quadrant, sin(135) = 1/sqrt(2) or approximately 0.7071. ...What is the value of #sin -45^@#? How do you find the trigonometric functions of values that are greater than #360^@#? How do you use the reference angles to find #sin210cos330-tan 135#?Tangent function ( tan (x) ) The tangent is a trigonometric function, defined as the ratio of the length of the side opposite to the angle to the length of the adjacent side, in a right-angled triangle. It is called "tangent" since it can be represented as a line segment tangent to a circle. In the graph above, tan (α) = a/b and tan (β) = b/a.Use this simple sec calculator to calculate the sec value for 135° in radians / degrees. The Trignometric Table of sin, cos, tan, cosec, sec, cot is useful to learn the common angles of trigonometrical ratios from 0° to 360°. Select degrees or radians in the drop down box and calculate the exact sec 135° value easily. α. cos (α) sec (α)

Click here:point_up_2:to get an answer to your question :writing_hand:dfraccos 135 circ cos 120 circ cos 135 circ cos 120Calculate sin(42) sin is found using Opposite/Hypotenuse. Determine quadrant: Since 0 ≤ 42 ≤ 90 degrees it is in Quadrant I. sin, cos and tan are positive. Determine angle type: 42 90°, so it is acute. sin(42) = 0.66913060573639. Write sin(42) in terms of cos. Since 42° is less than 90... We can express this as a cofunction. sin(θ) = cos ...Arcsin Calculator. In mathematics, the inverse trigonometric functions are the inverse functions of the trigonometric functions. Specifically, the arcsin is the inverse of the sine. It is normally represented by arcsin (θ) or sin -1 (θ). arcsin = ? Calculator to give out the arcsin value of a number between -1 and 1.sin(135) sin ( 135) Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. sin(45) sin ( 45) The exact value of sin(45) sin ( 45) is √2 2 2 2. √2 2 …sin(315) sin ( 315) Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because sine is negative in the fourth quadrant. −sin(45) - sin ( 45) The exact value of sin(45) sin ( 45) is √2 2 2 2. − √2 2 - 2 2. The result can be shown in multiple forms.

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Calculate the value of the sin of 245 ° To enter an angle in radians, enter sin(245RAD) sin(245 °) = -0.90630778703665 Sine, in mathematics, is a trigonometric function of an angle. The sine of an ...c o s 135 o = c o s ( 45 o + 90 o) = − c o s 45 o = − 1 2orc o s 135 o = c o s ( 180 o − 45 o) = − c o s 45 o = − 1 2. Was this answer helpful?Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.Sin 135° lies in the second quadrant and is positive. Sin 135° = sin (90° + 45° ) (Note: sin (90° + x )= cos x ) = cos 45° (in the first quadrant ) ( Note: the cosine is positive in the first quadrant ) = 1/√2. Sin 135° can be written as sin (180° – 45°) Hence, it lies in the second quadrant. When using the identity for calculation ...

If you're preparing the big feast on Turkey Day this year, you'd better not screw it up. Whether you’ve happily volunteered for the position of “Thanksgiving preparer” or it was th...cos (135°) cos ( 135 °) Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because cosine is negative in the second quadrant. −cos(45) - cos ( 45) The exact value of cos(45) cos ( 45) is √2 2 2 2. − √2 2 - 2 2. The result can be shown in multiple forms.In addition to degrees, the measure of an angle can be described in radians. See Example. To convert between degrees and radians, use the proportion \(\frac{θ}{180}=\frac{θ^R}{π}\). See Example and Example. Two angles that have the same terminal side are called coterminal angles. We can find coterminal angles by adding or …How do you find the trigonometric functions of any angle? Well, I guess you could use a special representation of the function through a sum of terms, also known as Taylor Series. It is, basically, what happens in your pocket calculator when you evaluate, for example, #sin (30°)#. Your calculator does this: #sin (theta)=theta-theta^3/ (3 ...ctg 135° = -1. ctg 135 degrees = -1. The ctg of 135 degrees is -1, the same as ctg of 135 degrees in radians. To obtain 135 degrees in radian multiply 135° by π / 180° = 3/4 π. Ctg 135degrees = ctg (3/4 × π). Our results of ctg135° have been rounded to five decimal places. If you want cotangent 135° with higher accuracy, then use the ...In this video, we learn to find the value of sin(-135). Here I have applied sin(-x) = -sin(x) identity to find the value of sin -135. The URL of the video ex...Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history ...For sin 180 degrees, the angle 180° lies on the negative x-axis. Thus, sin 180° value = 0. Since the sine function is a periodic function, we can represent sin 180° as, sin 180 degrees = sin (180° + n × 360°), n ∈ Z. ⇒ sin 180° = sin 540° = sin 900°, and so on. Note: Since, sine is an odd function, the value of sin (-180°) = -sin ...

Math. Calculus. (a) If t= 0 degrees, sin (t) (b) If t= 45 degrees, sin (t) = (c) If t = 90 degrees, sin (t) (d) Ift= 135 degrees, sin (t) = (e) If t= 180 degrees, sin (t) = (f) Ift= 225 degrees, sin (t) (g) If t= 270 degrees, sin (t) = (h) If t= 315 degrees, sin (t) Preview and cos (t) Preview Preview and cos (t) Preview Preview and cos (t ...

c² = b² + a²(sin(γ)² + cos(γ)²) - 2ab × cos(γ) As a sum of squares of sine and cosine is equal to 1, we obtain the final formula: c² = a² + b² - 2ab × cos(γ) 3. Ptolemy's theorem. Another law of cosines proof that is relatively easy to understand uses Ptolemy's theorem:Sin 120 degrees = - Sin 60 degrees = [tex]$-\frac{\sqrt{3}}{2}$[/tex] ... The tangent function gives a value of -1 at angles of 135 degrees and 315 degrees (or -45 degrees if moving in the clockwise direction). These angles are in the second and fourth quadrants where the tangent function is negative.We convert degrees to radians because radians provide a more natural and consistent unit for measuring angles in mathematical calculations and trigonometric functions. Is 180 equivalent to 2π? 180 degrees is equivalent to π radians, 360 degress is equivalent to 2π.What is the value of #sin -45^@#? How do you find the trigonometric functions of values that are greater than #360^@#? How do you use the reference angles to find #sin210cos330-tan 135#? The value of cos 135 degrees can be calculated by constructing an angle of 135° with the x-axis, and then finding the coordinates of the corresponding point (-0.7071, 0.7071) on the unit circle. The value of cos 135° is equal to the x-coordinate (-0.7071). ∴ cos 135° = -0.7071. What is the Value of Cos 135 Degrees in Terms of Sin 135°? To find the value of sin 35 degrees using the unit circle: Rotate 'r' anticlockwise to form a 35° angle with the positive x-axis. The sin of 35 degrees equals the y-coordinate (0.5736) of the point of intersection (0.8192, 0.5736) of unit circle and r. Hence the value of sin 35° = y = 0.5736 (approx)To change 3π/4 radians to degrees multiply 3π/4 by 180° / $\pi$ = 135°. Sin 3π/4 = sin 135 degrees. Our results of sin3π/4 have been rounded to five decimal places. If you want sine 3π/4 with higher accuracy, then use the calculator below; our tool displays ten decimal places.Find the following values: 1) cos (-45 degree) = , 2) sin(-135 degree) = , 3) cos(-30 degree) = , 4) sin (-150 degree) = , 5) cos (135 degree) = , 6) sin (-90 degree) = . Find the angle \alpha in degrees in the first quadrant that satisfies \sin \alpha = \frac{\sqrt{2{2} . Find the exact value of the following. a. cos 315 degrees. b .Jan 18, 2024 · What is tan 30 using the unit circle? tan 30° = 1/√3. To find this answer on the unit circle, we start by finding the sin and cos values as the y-coordinate and x-coordinate, respectively: sin 30° = 1/2 and cos 30° = √3/2. Now use the formula. Recall that tan 30° = sin 30° / cos 30° = (1/2) / (√3/2) = 1/√3, as claimed. Calculate tan(135) tan is found using Opposite/Adjacent. Determine quadrant: Since 90 135 180 degrees it is located in Quadrant II. sin is positive. Determine angle type: 135 > 90°, so it is obtuse. tan(135) = -1. Excel or Google Sheets formula: Excel or Google Sheets formula:=TAN(RADIANS(135)) Special Angle Values

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Sine and cosine are the fundamental trigonometric functions arising from the previous diagram:. The sine of theta (sin θ) is the hypotenuse's vertical projection (green line); andThe cosine of theta (cos θ) is the hypotenuse's horizontal projection (blue line).We can rotate the radial line through the four quadrants and obtain the values of the trig …By definition tf.atan2 gives the difference automatically in the closed interval [-pi, +pi] (that is, [-180 degrees, +180 degrees] ). Hence, you can use. I think Keras understand this TensorFlow code. This solution works great, but just to be clear, atan2 returns the minimal difference in the interval [-pi, pi] radians.Sin 135° lies in the second quadrant and is positive. Sin 135° = sin (90° + 45° ) (Note: sin (90° + x )= cos x ) = cos 45° (in the first quadrant ) ( Note: the cosine is positive in the first quadrant ) = 1/√2. Sin 135° can be written as sin (180° – 45°) Hence, it lies in the second quadrant. When using the identity for calculation ...As below. hat (-135) = -(3pi)/4 = 2pi - (3pi)/4 = (5pi)/4 Angle falls in III quadrant where only tan, cot are positive. sin ((5pi)/4) = sin (pi + (pi/4)) = - sin (pi ...The cot of 135 degrees equals the x-coordinate(-0.7071) divided by y-coordinate(0.7071) of the point of intersection (-0.7071, 0.7071) of unit circle and r. Hence the value of cot 135° = x/y = -1. Cot 135° in Terms of Trigonometric Functions. Using trigonometry formulas, we can represent the cot 135 degrees as: cos(135°)/sin(135°)Let z1 = 4(cos 135° + i sin 135°) and z2 = 2(cos 45° + i sin 45°). Write the rectangular form of z1z2. Can someone help me ? Explain ... write 12(cos 60degrees + i sin 60 degrees) in rectangular form. asked Mar 5, 2014 in GEOMETRY by andrew Scholar. rectangular-form;Roman Numerals Radical to Exponent Exponent to Radical To Fraction To Decimal To Mixed Number To Improper Fraction Radians to Degrees Degrees to Radians Hexadecimal Scientific Notation Distance Weight Time Volume. Topic. Pre Algebra ... \sin (x)+\sin (\frac{x}{2})=0,\:0\le \:x\le \:2\pi ... sin -135. en. Related Symbolab blog posts. High School ...Free math problem solver answers your trigonometry homework questions with step-by-step explanations. ….

If P = sin 300 ∘ ⋅ tan 330 ∘ ⋅ sec 420 ∘ tan 135 ∘ ⋅ sin 210 ∘ ⋅ sec 315 ∘ and Q = sec 480 ∘ ⋅ cosec 570 ∘ ⋅ tan 330 ∘ sin 600 ∘ ⋅ cos 660 ∘ ⋅ cot 405 ∘, then the value of P and Q are respectivelyHow to Find a Reference Angle in Degrees Finding a reference angle in degrees is straightforward if you follow the correct steps. 1. Identify your initial angle. For this example, we'll use 440° 2. The angle is larger than a full angle of 360°, so you need to subtract the total angle until it's small. 440° - 360° = 80° 3.Free Pre-Algebra, Algebra, Trigonometry, Calculus, Geometry, Statistics and Chemistry calculators step-by-stepFor sin 450°, the angle 450° > 360°. Given the periodic property of the sine function, we can represent it as sin (450° mod 360°) = sin (90°). The angle 450°, coterminal to angle 90°, lies on the positive y-axis. Thus, sin 450 degrees value = 1. Similarly, sin 450° can also be written as, sin 450 degrees = (450° + n × 360°), n ∈ Z.Convert from Degrees to Radians sin (15) sin(15) sin ( 15) To convert degrees to radians, multiply by π 180° π 180 °, since a full circle is 360° 360 ° or 2π 2 π radians. The exact value of sin(15) sin ( 15) is √6−√2 4 6 - 2 4. Tap for more steps... √6−√2 4 ⋅ π 180 6 - 2 4 ⋅ π 180 radians. Multiply √6−√2 4 ⋅ π ...Calculate sin(12) sin is found using Opposite/Hypotenuse. Determine quadrant: Since 0 ≤ 12 ≤ 90 degrees it is in Quadrant I. sin, cos and tan are positive. Determine angle type: 12 90°, so it is acute. sin(12) = 0.20791169058367. Write sin(12) in terms of cos. Since 12° is less than 90... We can express this as a cofunction. sin(θ) = cos ...Without using a calculator, compute the sine and cosine of 135° by using the reference angle. Give the sine and cosine as reduced fractions or with radicals. Do not use decimals.What is the reference angle? degrees.In what quadrant is this angle?sin(135°)=cos(135°)=This simplifies to option (a) The sine of 27 degrees divided by P equals the sine of 135 degrees divided by 9.5, which is the correct answer.To summarize, for triangle PQR, where angle at P is 27°, angle at R is 135°, and side R measures 9.5, using the Law of Sines we can say:P = sin(27°) * 9.5 / sin(135°) to find the length of side P. Sin 135 degrees, Level up on all the skills in this unit and collect up to 1,000 Mastery points! Start Unit test. In this topic, we will learn what an angle is and how to label, measure and construct them. We will also explore special types of angles., Notice also that sin θ = cos (π 2 − θ), sin θ = cos (π 2 − θ), which is opposite over hypotenuse. Thus, when two angles are complementary, we can say that the sine of θ θ equals the cofunction of the complement of θ. θ. Similarly, tangent and cotangent are cofunctions, and secant and cosecant are cofunctions., Answer: Step-by-step explanation: The Law of Sines states that in any triangle, the ratio of the length of a side to the sine of its opposite angle is constant and equal to the ratios for the other two sides:. Therefore, for triangle PQR:. Given values:. Q = 18° R = 135° q = 9.5; Substitute the given values into the equation:. Therefore, the equation to find the length or r using the Law of ..., Method 2. By using the value of cosine function relations, we can easily find the value of sin 120 degrees. Using the trigonometry formula, sin (90 + a) = cos a, we can find the sin 120 value. As given, sin (90° +30°) = cos 30°. It means that sin 120° = cos 30°. We know that the value of cos 30 degrees is √3/2., Find the Exact Value sin (135 degrees ) sin(135°) sin ( 135 °) Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. sin(45) sin ( 45) The exact value of sin(45) sin ( 45) is √2 2 2 2. √2 2 2 2. The result can be shown in multiple forms. Exact Form: √2 2 2 2., Answer: sin (125°) = 0.8191520443. Note: angle unit is set to degrees. Use our sin (x) calculator to find the sine of 125 degrees - sin (125 °) - or the sine of any angle in degrees and in radians., Hence, cos2( −135o) = ( − √2 2)2 = 1 2. Answer link. cos^2 (-135^o)=1/2 First of all, we should assume that -135 is degrees, not radians. Secondly, recall the definition of a function cosine. Cosine of an angle is an abscissa (X-coordinate) of the point on a unit circle at the end of a radius that makes this angle in the counterclockwise ..., It is measured clockwise from 0°. Sine is negative in the 4th qudrant, so sin (-30)° = -sin 30° = 1/2. Question: Find the exact value of sin 210°. Solution: 210° = (180 + 30)° so this is in the 3rd quadrant and 30° is the related angle. Sine is negative in the 3rd quadrant so: sin 210° = - sin 30°. = - 1/2., Free trigonometry calculator - calculate trignometric equations, prove identities and evaluate functions step-by-step, Trigonometry. Find the Exact Value tan (135) tan (135) tan ( 135) Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because tangent is negative in the second quadrant. −tan(45) - tan ( 45) The exact value of tan(45) tan ( 45) is 1 1. −1⋅1 - 1 ⋅ 1., sin(angle ABC) = height / BC. sin(135 degrees) = height / 8 (1/2) = height / 8. height = 4. ... In this case, we know that the base is BC = 8 and the angle between AB and BC is 135 degrees. The height of the triangle is equal to the length of the altitude from A to BC. We can find the length of the altitude using the following formula:, I want to know why this article says "Remember that if the missing angle is obtuse, we need to take 180 degrees and subtract what we got from the calculator" when using the law of sines to find a missing angle. Are there videos that explain why this is? ... Since you are using the sin^-1 function you will only ever get 1 angle as the range is ..., Trigonometry. Find the Exact Value tan (135) tan (135) tan ( 135) Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because tangent is negative in the second quadrant. −tan(45) - tan ( 45) The exact value of tan(45) tan ( 45) is 1 1. −1⋅1 - 1 ⋅ 1., Find the Exact Value sin(135 degrees )-sin(270 degrees ) Step 1. Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Step 2. ... Make the expression negative because sine is negative in the third quadrant. Step 4. The exact value of is . Step 5. Multiply. Tap for more steps... Step 5.1. Multiply by ..., How do I convert the polar coordinates #3(cos 210^circ +i\ sin 210^circ)# into rectangular form? What is the modulus of the complex number #z=3+3i#? What is DeMoivre's theorem?, Find the exact values of the sine, cosine, and tangent of the angle. 165° = 135° + 30° sin 165 degrees= cos 165 degrees= tan 165 degrees= This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts., Then, they would also know the trig ratios for angle measuring 30 + 45 = 75, 45 − 30 = 15 , and 45 + 45 + 30 = 130 degrees, for example. If such a person also knew the sine and cosine for a straight angle, he or she could then use reference angles to find 180 − 45 = 135 degrees or 180 − 75 = 105 degrees., wind effects on north-south component = 30 mph * sin(135 degrees) ≈ 21.21 mph. Finally, we can subtract the wind effects from the east-west and north-south components to find the magnitude and direction of the plane's actual displacement if there has been no wind. We can use the Pythagorean theorem and trigonometry to calculate this:, or. Note: We could also find the sine of 15 degrees using sine (45° − 30°). sin 75°: Now using the formula for the sine of the sum of 2 angles, sin ( A + B) = sin A cos B + cos A sin B, we can find the sine of (45° + 30°) to give sine of 75 degrees. We now find the sine of 36°, by first finding the cos of 36°., Notice also that sin θ = cos (π 2 − θ), sin θ = cos (π 2 − θ), which is opposite over hypotenuse. Thus, when two angles are complementary, we can say that the sine of θ θ equals the cofunction of the complement of θ. θ. Similarly, tangent and cotangent are cofunctions, and secant and cosecant are cofunctions., Answer: sin (85°) = 0.9961946981. Note: angle unit is set to degrees. Use our sin (x) calculator to find the sine of 85 degrees - sin (85 °) - or the sine of any angle in degrees and in radians., For formulas to show results, select them, press F2, and then press Enter. If you need to, you can adjust the column widths to see all the data. Sine of pi radians (0, approximately). Sine of pi/2 radians. Sine of 30 degrees. Sine of …, The given expression is 2 tan 2 ( 120 ∘) + 3 sin 2 ( 150 ∘) − cos 2 ( 180 ∘). View the full answer Step 2. Unlock. Answer. Unlock. Previous question Next question. Transcribed image text: Evaluate the expression. 2 tan^2 120 degree 3 sin^2 150 degree - cos^2 180 degree., Trigonometry. Find the Exact Value sin (240 degrees ) sin(240°) sin ( 240 °) Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because sine is negative in the third quadrant. −sin(60) - sin ( 60), Calculate the value of the sin of -15 ° To enter an angle in radians, enter sin(-15RAD) sin(-15 °) = -0.258819045102521 Sine, in mathematics, is a trigonometric function of an angle. The sine of ..., At 45 degrees the value is 1 and as the angle nears 90 degrees the tangent gets astronomically large. You are left with something that looks a little like the right half of an upright parabola. ... how can you say sin 135*, cos135*...(trigonometric ratio of obtuse angle) because trigonometric ratios are defined only between 0* and 90* beyond ..., Find the Exact Value sin(45 degrees )+sin(135 degrees )+sin(225 degrees )+sin(315 degrees ) Step 1. Simplify each term. Tap for more steps... Step 1.1. The exact value of is . Step 1.2. Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Step 1.3., Solve your math problems using our free math solver with step-by-step solutions. Our math solver supports basic math, pre-algebra, algebra, trigonometry, calculus and more., or. Note: We could also find the sine of 15 degrees using sine (45° − 30°). sin 75°: Now using the formula for the sine of the sum of 2 angles, sin ( A + B) = sin A cos B + cos A sin B, we can find the sine of (45° + 30°) to give sine of 75 degrees. We now find the sine of 36°, by first finding the cos of 36°., Trigonometry. Find the Value Using the Unit Circle sin (135 degrees ) sin(135°) sin ( 135 °) Find the value using the definition of sine. sin(135°) = opposite hypotenuse sin ( 135 °) = …, Use this simple cos calculator to calculate the cos value for 135° in radians / degrees. The Trignometric Table of sin, cos, tan, cosec, sec, cot is useful to learn the common angles of trigonometrical ratios from 0° to 360°. Select degrees or radians in the drop down box and calculate the exact cos 135° value easily., Trigonometry. Find the Exact Value sin (225) sin(225) sin ( 225) Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because sine is negative in the third quadrant. −sin(45) - sin ( 45) The exact value of sin(45) sin ( 45) is √2 2 2 2. − √2 2 - 2 2., Popular Problems. Trigonometry. Find the Exact Value cot (120 degrees ) cot (120°) cot ( 120 °) Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because cotangent is negative in the second quadrant. −cot(60) - cot ( 60) The exact value of cot(60) cot ( 60) is 1 ...