11) cos x csc X tan x - 1 11) 12) cos2x - sin2x = 1 - 2 sin²x 12)

Q: Prove cos - sine cos + sin sec 28-tan 20.

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Q: fOo)=Sinx-41 Cos x 1X-1 cos X (x)

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Q: Verify the identity: sin²x (1+ncot²x) + cos²x (1+tan²x) = sin²x(n+cot²x) + cos²x(n+tan²x)

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Q: Cosx 1+sinx 11. 1+sinx 2secx Cosx

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Q: 11) Prove cos+x -sinfx = cos 2x

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Q: 10) Verify the identity sin0+cos0 sin0-cose %3D = sec0csc0 cose sino

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Q: 1) cos- 1 2 3) sin-1 V3 5) cos-.

A: As per our guidelines we are supposed to answer only first three parts.kindly repost others part as…

Q: Prove that sin? 0 + cosª 0 = sin“ 0 + cos² 0.

A: Using fundamental identity of trigonometry.

Q: cos(x) 3) 1-sin(x) sec(x) + tan(x)

A: