What is the exact value of cos ZPQR? 3. R. 21 16 7 16 3 16 4. 1/4

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A: If , then the independent variable x is called the input of the function and the dependent variable…

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Q: (Sinx) (xl (X+3}*

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A: We will find the value of cos(-5π4) .Below find the solution in the image.

Q: A 4. If sec(a)= 2, then what is the value of cos(a)? 19.4 O 25.2 19.4 16.1 19.4 19.4 25.2 16.1 25.2

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Q: ) Prove that 2+sinZA Cos A-SinA

A: To Prove: cos3A-sin3AcosA-sinA=2+sin2A2

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A: We are required to: Find the value of z such that z=cos-12.

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A: In complex plane  z = x + iy    = (x,y)

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Q: 6.. If cos 0 = and sin 0 < 0, find two possible values for 0 (in radians). 99+ t8 47 f6 f5 l 10

A: cos θ = 1/2 =&gt; θ = 60o Also cos θ = cos(360-θ) 360-θ = 360-60 = 300 ∴ cos 60 = cos(300) = 1/2…

Q: 9. Sec. 2.1 Simplify the following expression using exact values. (a) sin?(45°) – 2 sin(45°)…

A: To simplify:a) The expression

Q: r=4 cos(309 -44

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Q: 5. If sec(a) 25.2, then what is the value of cos(a)? 19.4 16.1 19.4 19.4 25.2 25.2 19.4 16.1 25.2

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Q: 3. )Find t cos 20atdt =?

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Q: If cos t 3 and t is in the 3rd quadrant, then cot t = 9 V72 V72 3 V72 9 V72 3 3 V72

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Q: 4. What is the value of cos 30? 213 V3 A. В. 2 c D. 2 3 5. What is the value of sec 45? HIN

A: To find the value of given trigonometric ratio.

Q: 87 cos e do %3D O 4

A: In this question we have to evaluate the Integration.

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Q: Suppose cos 2A and 2A is an angle in the First Quadrant. 9. Then cos A %3D

A: We know that 1+cos2x = 2cos2x ⇒cosx=±1+cos2x2 Sign will be according to quadrant in which x belongs…