$\int \operatorname{cosec} x d x-1$ এর মান কোনটি ?

$\ln |\sin x|+c$

$\ln |\sec x|+c$

$\ln \left|\tan \frac{x}{2}\right|+c$

$\ln \left|\tan \left(\frac{\pi}{4}+\frac{x}{2}\right)\right|+c$