Question: Prove the following identities. a. b. c. d. (2 cos ) 4 sin = cos 4 . tan 0 = sin0 1-sin0

Prove the following identities.

a.

tan 0 = sin0 1-sin0

b.

c.

d. (2 − cos² θ)² − 4 sin² θ = cos4 θ.

tan 0 = sin0 1-sin0

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