Math CentralQuandaries & Queries


Question from rita, a student:

prove: sin x/ 1+cos x = 1-cos x/ sin x

Hi Rita. Here's a hint:

Identity: sin2 x = 1 - cos2 x

Difference of squares : 1 - cos2 x = (1 - cos x) (1 + cos x)

Hope this helps!
Stephen La Rocque

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