Hey
Im stuck on the last step of another trig sub again...
Heres the problem: integrate 1/((x^2)*(sqrt(4x^2-9))
I've sub'd x=3/2sec(theta)
I get to the point after integrating ..(2sin(theta))/9 and have to sub back in for theta
I realise theta=sec^-1(2x/3) but do not understand how i can use 2(sin(sec^-1(2x/3))/9 to finish the problem.
Please help =)
thanks