Question

Find the integrals of the function :
$\frac{1-\cos x}{1+\cos x}$

Answer 1

$\frac{(1-\cos x)(1-\cos x)}{(1+\cos x)(1-\cos x)}=\frac{1+{\cos }^{2}x-2x}{1-co{s}^{2}x}=cose{c}^{2}x(1-2x)+co{t}^{2}x$