Images 1 SIN 2A

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1 sin 2a. 1-Cos2a+sin2a/1+cos2a+sin2a. Sin2a cos2a 1 2cos2a. Cos4 a - sin4 a/cos2a =1. 1-Cos2a/1-sin2a.
1-Cos2a+sin2a/1+cos2a+sin2a. Sin2a cos2a 1 2cos2a. Cos4 a - sin4 a/cos2a =1. 1-Cos2a/1-sin2a.

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