Question

(1/cos theta +1)(1/cos theta -1)=sin²theta/1-sin²theta
prove​

Answer 1

Answer:

hope my answer helps you

Answer 2

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