$\int \cos x^{\circ} d x=$ কত ?

$\frac{-180}{\pi} \cos \frac{\pi x}{180}+c$

$\sin x+c$

$\frac{180}{\pi} \sin \frac{\pi x}{180}+c$

$\frac{-180}{\pi} \sin \frac{\pi x}{180}+c$