# calculus

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.