Use 2 or more substitutions to find the following integrals
hint : begin with u=cosx
Integral 0--->pi/2 (cosxsinx)/swrt(cos2x+49 dx
The Attempt at a Solution
I'm still a little fuzzy on using multiple substitutions. From what I've read on the text and previous easier equations, it just means that there are multiple u=(something) that can work. Is that right?
so I tried u=cosx
-1 * Integral 0--->pi/2 u/sqrt(u2+49) du
it's here that I am brickwalling. I really want to know how it works, so if you wouldn't mind a step by step process, I'd appreciate greatly.