# calculus

posted by
**Cindy**
.

How do you find:

the Integral of arcsin(1 / (sqrt x^2 - 1) ) dx ??

(The integral of arcsin of one over the squareroot of x squared minus 1)

So far, I've used trig integration to simplify down to

arcsin(1/tanb) *secbtanb

b is theta

Then, I've used integration by parts. But i'm getting very stuck.

Please help? I've been working on this problem FOREVER.

Thank you!