Mathematics

Mathematics, 14.07.2019 01:30, hann647

Prove these two 1.) sin x / 1-cos x + sin x / 1+ cos x = 2 csc x 2.) - tan2x + sec2x = 1

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Prove these two 1.) sin x / 1-cos x + sin x / 1+ cos x = 2 csc x 2.) - tan2x + sec2x = 1...

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