If 20 is in QII and cos 36 cos 0+ sin 30 sin 0 = then sin 20 is equal to 2 O V2 O V3 2 0 1 o 1

Q: 7) Simplify sin (cos-1 (2x)) to an expression involving no trig or inverse trig functions. (Assume…

A: Approach to solving the question:The following key concepts can be used to simplify given…

Q: 3. Which expression is equal to 02 O O O O 1 -1 -2 sinx-cos X sin² x-cos²x using identities?

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Q: Solve the 6 sin>x -Cos X5 trig guatin

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Q: sin (+) can be expanded to: π TT O sin COS sin sin 4 7 TT O sin sin COS cos 4 T Osin COS + cos sin…

A: Solved below.

Q: Use the addition formula to prove cos 30 = 4cos3 0 - 3 cos0

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Q: A. cos 2A = cos² A-sin² A B. cos 2A = (cos A - sin A) (cos A + sin A C. cos 2A = 2 cos² A-1 D. cos…

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Q: Which of the following is equal to cos 63?

A: We know that the identitycos2x=cos2x-sin2x         =1-2sin2x         =2cos2x-1…

Q: 2 1-cos 2z Is equivalent to: O cos? x O sin? O sec? x csc2 x

A: Solve  2/1-cos2x

Q: 7) Use sun and difference formula to verify the identity cos(A+B) cos(A-B) = cos2A + cos2B-1 A-B) =…

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Q: Evaluate S cos ve Vē sin? ve

A: consider I=∫cosθθ sin2θdθto solve the itegral we can use method ofsubstitution

Q: Verify the identity. (sec ² 0+1) (- sin² 0+1) = 2-sin ²0 20 rch Which of the following four…

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Q: snip

A: sin4θ=sin2θ2=1-cos2θ22=141+cos22θ-2cos2θ=141+1+cos4θ2-2cos2θ=14+1+cos4θ8-12cos2θ=14+18+18cos4θ-12cos…

Q: a) Is cos(2-30°) equal to cos² 30° - sin² 30° ? Yes or No. || b) Find the value of cos(230°).

A: a) cos ( 2.30°) = cos230 - sin230

Q: Find sec 0 if cos 0 ||

A: Our Aim is to find sec θ given that cos  θ=13

Q: 23п 23T 2) Evaluate cos 12 cos () + sin (") sin COS 12. 12 12 一

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Q: Which of the following expressions is equivalent to 2 sin x cos x 2 sec z seca 2 cos x COST 1 + sin…

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Q: Find the exact value of 23л sin 30 17 237 17 COS + cos sin 30 30 30

A: Let's find.

Q: Use the figure to derive the formulas for sin COS and tan 2 sin (9) - COS tan (9) - 12 cos Ꮎ Ꮎ sin 0…

A: First, let us consider △ABC :Find its hypotenuse using the Pythagorean Theorem.AB2+BC2=AC2Substitute…

Q: Find cos 20 if sin 0 = cos 20

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Q: If cos (z +) + sin (z -) If cos( x + 6 + sin ( x 3 A, then the number A = %3D

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Q: Verify the identity. cos 7x- cos 9x tan 8x sin 7x- sin 9x Statomont

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Q: Prove that cos 4 5 + cos -1 12 13 = COS 33 65

A: We have to prove cos-145+cos-11213=cos-13365

Q: 2 sin- If p = cos -1 q, show that 4p? – 4pt + q? = 1.

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Q: b) (2 cos² B-1)² cos4 B-sin4 B = 1-2 sin² ß

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Q: Evaluate the following: 1) (1+ tan? 0) + iv1– sin? 6 2) (x + yi)? = 2 + 4i 3) (cos 20 – sin* 20) +…

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Q: VERIFY THE IDENTITIES

A: To verify

Q: verify that el0 + e-i0 COS %3D

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Q: (b) cos cos ( 13 ) 131 18 21 18 21 sin COS -sin 18 18

A: To evaluate the given trigonometric expression