# Math Help - Find the value of A :

1. ## Find the value of A :

If $\int \frac{1}{1+\sin x}\ dx= \tan\left(\frac{x}{2}+a\right)$ find the value of a.

2. Originally Posted by great_math
If $\int \frac{1}{1+\sin x}\ dx= \tan\left(\frac{x}{2}+a\right)$ find the value of a.
were there limits on the integral?

if not, just integrate the left hand side and see where it takes you.

hint: multiply the integral by $\frac {1 - \sin x}{1 - \sin x}$ and simplify before integrating