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Mathematics, 13.10.2019 21:30 cieloromero1

Prove: 1-tan^2 x/ 1+tan^2 x= 1-sin^2 x


Prove: 1-tan^2 x/ 1+tan^2 x= 1-sin^2 x

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Prove: 1-tan^2 x/ 1+tan^2 x= 1-sin^2 x
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