- #1
jhahler
- 15
- 0
Homework Statement
integral of sqrt(x^2-36)/x)
Homework Equations
sqrt(x^2-a^2) = asec(u)
Pythagorean identity
The Attempt at a Solution
I used trig sub on the x^2-36 and changed that to x=36sec(u) and dx= 36sec(u)tan(u). I simplified the square root in the numerator using sec^2(u)-1 = tan^2(u). This gave me (6tan(u)/36sec(u))(36sec(u)tan(u)) What trig identities do I need to proceed? Or did I use the wrong kind of trig sub? Any help is greatly appreciated in advance.