Question

cos5 = 16cos5 - 2cos3 +5COS
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Answer 1

Answer:           Mark me brainliest and thank.

The identities used are:

• cos (A+B) = cos A cos B - sin A sin B

• cos 2A = 2 cos^2 A - 1

• sin 2A = 2 sin A cos A

• cos 3A = 4 cos^3 A - 3 cos A

• sin 3A = 3 sin A - 4 sin^3 A

• sin^2 A = 1 - cos ^2 A

Hope it helps

Step-by-step explanation:

Refer to attachment.