What is the integral ∫dxx2+a2\int \frac{dx}{x^2+a^2}∫x2+a2dx?
1aarctan(x/a)+C\frac{1}{a}\arctan(x/a) + Ca1arctan(x/a)+C
arctan(x/a)+C\arctan(x/a) + Carctan(x/a)+C
1aarcsin(x/a)+C\frac{1}{a}\arcsin(x/a) + Ca1arcsin(x/a)+C
None