Question

- cos 0 = tan 0.sino
cos​

Answer 1

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Answer 2

Solution →

$\frac{1 - {cos}^{2} \:\theta }{cos \: \theta} = tan \: \theta \times sin \: \theta \:$

LHS →

$= \frac{1 - {cos}^{2} \:\theta }{cos \: \theta}$

$= \frac{ {sin}^{2}\theta }{cos \: \theta}$

$= \frac{sin \: \theta}{cos \: \theta} \times sin \: \theta$

$= tan \: \theta \times sin \: \theta$

RHS

Hence Proved !!

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