Question: 1. prove for 1+cot^2 =csc^2 2. verify for the identity cos x /1 - sin x = 1 + sin x / cos x 3.

1. prove for 1+cot^2=csc^2

2. verify for the identity cos x /1 - sin x = 1 + sin x / cos x

3. is the equation an identity

s 2x = 1-2sin2x

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