Question: Prove the equations 1. 2cos^2a = (1 + sec2a) cos2a 2. Sin2x = 2sin^2 (x + pi/4) - 1

Prove the equations 1. 2cos^2a = (1 + sec2a) cos2a 2. Sin2x = 2sin^2 (x + pi/4) - 1

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