Solve Indefinite Integral: 1/(x(sqrt(x^2 - 4)))

[sausu]

Homework Statement

integral 1/(x(sqrt(x^2 - 4)))

Homework Equations

I don't know if there are any "equations" for integrals...

The Attempt at a Solution

Int(1/(x(Sqrt(4(x^2 /4)-1)
Int(1/(2x(Sqrt((x^2 /4)-1)
1/2 int(1/(x(Sqrt((x /2)^2)-1)
U-sub
u=x/2
du=1/2 dx
2du= dx
(This is where I hit a wall..I have no clue what I'm doing)

 

[Bohrok]

For this one, you'll want to use a trig substitution instead of a regular u-substitution.

 

[sausu]

For this one, you'll want to use a trig substitution instead of a regular u-substitution.

We never learned how to do a trig substitution...
BTW I'm only in Calculus BC. We're just learning the basics of integrating.