Math, asked by safecar2800, 5 months ago

If sin + sin2 = 1 , then prove that cos2 + cos4 = 1.

Answers

Answered by Anonymous

0

Answer:

sina+sin2a=1

→ sina=1-sin2a

→sina=cos2a

→ sin2a=cos4a

→1-cos2a=cos4a

→ cos2a+cos4a31

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