7. Verify the identity 1+cos 2x+2sin² x = 2 1 and <θ<π, find sin- 8. Given tan O 3 2 9. Use half angle identity to find cos 8

Q: Find and explain  the errors that have been made

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Q: 7. Prove the following trigonometric identity: secx-2sin x = (sin x − cosx)2 cosx

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Q: 5. Which of the following is NOT an identit 1 - cos²x = sin²x 2 tan²x = 1 + sec¹x COSX sinx = cott…

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Q: 11-12: Simplify. 11. cscß(cosß + sinß) 1. 1+sinx 12. 1. 1-sinx

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Q: cos x tan x 1+ cot x

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Q: Ptz 1. sin x secx = tanx 2. cos² x-sin2x-1-2 sin²x Pt₂

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Q: 4л coS 씀Cos 즙Cs -sin sin 15 15 15

A: We have to find the exact value cosπ15cos4π15-sinπ15sin4π15.

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

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Q: Suppose that csc a = and 0<a< 4 Find the exact values of cos and tan-

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Q: Verify the identity (sin x + cos x)² = 1+ sin 2x by converting the left hand side to the right. Give…

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Q: 35. Verify the following: sec sin 0.tan 0 sin e cos² e

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Q: 22. Use trig identities to simplify the following expressions: 22a. cot θ csc θ, 22b. csc(α) cos(α)…

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Q: csc² x+sec² x 1 cos² sin² 10

A: As we know from the trigonometric identity: 1). sinx=1cscx 2). cosx=1secx 3). sin2x+cos2x=1   Given:…