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| Math Central | Quandaries & Queries |
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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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