Question

(cos²(x)/1-sinx) -sinx

Answer 1

$frac{1- sin^{2}(x) }{1-sin(x)} -sin(x)$
$frac{(1-sin(x))*(1+sin(x))}{1-sin(x)} -sin(x)$
$1+sin(x)-sin(x)=1$

Answer 2

Спасибоооо