$\int \frac{\cos \theta+\sin \theta}{\cos \theta-\sin \theta} d \theta$ এর মান হলো?

$\log _{e} \cos \left(\theta+\frac{\pi}{4}\right)+c$

$\log _{e} \sin \left(\theta-\frac{\pi}{4}\right)+c$

$\log _{e} \sec \left(\theta+\frac{\pi}{4}\right)+c$

$\log _{e} \operatorname{cosec}\left(\theta+\frac{\pi}{4}\right)+c$

$\log _{e} \sin 2 \theta+c$