1.

What is the value of [(cos 3θ + 2cos 5θ + cos 7θ)÷(cos θ + 2cos 3θ + cos 5θ)] + sin 2θ tan 3θ?

A. cos 2θ
B. sin 2θ
C. tan 2θ
D. cot θ sin 2θ
Answer» B. sin 2θ


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