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Homework Statement
Please explain how to use the substitution rule in indefinite integrals. I am unable even to start the problem.
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Sure, that works.
Another substitution that isn't so obvious is to let u = sec2t (using t for theta). Then du = 2sec(2t)tan(2t)dt
[tex]\int sec(2t)tan(2t)dt = \frac{1}{2}\int 2sec(2t)tan(2t)dt = \frac{1}{2}\int du= \frac{u}{2} + C = \frac{sec(2t)}{2} + C[/tex]
This will work, but will require another substitution.Thank you very much!
I am also stuck on this one. e^{x} has been always tricky for me.