Question

cos /1-tan -sin ²/cos -sin =cos +sin​

Answer 1

$\frac{cos}{1 - tan} - \frac{ {sin}^{2} }{cos - sin} \\ = \frac{ {cos}^{2} }{cos - sin} - \frac{ {sn}^{2} }{cos - sin} \\ = \frac{ {cos}^{2} - {sin}^{2} }{cos - sin} \\ = \frac{(cos + sin)(cos - sin)}{(cos - sin)} \\ = cos + sin$

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