\(\int \frac{dx}{\sqrt{x^2-a^2}}\) equals1\(\sin^{-1}\left(\frac{x}{a}\right)+C\)2\(\log \left|x+\sqrt{x^{2}-a^{2}}\right|+C\)3\(\log \left|x+\sqrt{x^{2}+a^{2}}\right|+C\)4NoneAnswer & explanation+Correct answer: option 2Let \(x=a \sec \theta\)
