For $y=\frac{\sin x}{1+\cos x}$, find $\frac{\mathrm dy}{\mathrm dx}$ in simplest form. State wh

Question

For $y=\frac{\sin x}{1+\cos x}$, find $\frac{\mathrm dy}{\mathrm dx}$ in simplest form. State where the original function is undefined.

Accepted Answer

$\frac1{1+\cos x},\ x\ne(2k+1)\pi$

Quotient rule with a trigonometric function