- #1
karush
Gold Member
MHB
- 3,269
- 5
Evaluate
$$\displaystyle \int\sqrt{{x}^{2}-1} \ dx$$
First the indenitly of $\tan^2 \left({x}\right)=\sec^2 \left({x}\right)-1$ fits the expression in the radical
But not sure how to set up the substitution
$$\displaystyle \int\sqrt{{x}^{2}-1} \ dx$$
First the indenitly of $\tan^2 \left({x}\right)=\sec^2 \left({x}\right)-1$ fits the expression in the radical
But not sure how to set up the substitution