Question

(1 + cosθ ) (1 – sinθ ) (1+ cot 2 θ ) = 1

Answer 1

$(1 + cosx )(1 - sinx) = 1 \div (1 + cos2x)$

$i \: know. \: (1 + cos2x) = 2 { \cos }^{2} x$

$solve$

$(1 - sinx + cosx - sinx \times cosx) =1 \div ( 2 { \cos}^{2} x)$

$2 { \cos}^{2}x(1 - sinx + cosx - sinx \times cosx) = 1.answer$