Is there anyone who could walk me through this practice problem?:

I really struggle with integrals involving radicals or trigonometry.

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- Sep 27th 2013, 10:06 AMinfraRedintegral with radical and trigonometry
Is there anyone who could walk me through this practice problem?:

I really struggle with integrals involving radicals or trigonometry. - Sep 27th 2013, 08:51 PMchiroRe: integral with radical and trigonometry
Hey infraRed.

There is probably a simpler way but one suggestion I have is to use complex numbers. cos(x) = [e^(ix) + e^(-ix)]/2 and sin(x) = [e^(ix) - e^(-ix)]/2i.

Given that you probably haven't done a lot of stuff like that can you mention the identities and concepts that you have studied in the course that you are taking? - Sep 28th 2013, 07:21 AMinfraRedRe: integral with radical and trigonometry
My apologies, but I actually misread the problem. (cos(x)/sin(x)) is supposed to be (cos(x)/sin(x))^2. I think that makes the problem a lot more workable.

- Sep 28th 2013, 07:33 AMSorobanRe: integral with radical and trigonometry
Hello, infraRed!

Quote:

Apply some trig identities . . .

So we have: .

Got it?

- Sep 28th 2013, 07:39 AMProve ItRe: integral with radical and trigonometry
- Sep 28th 2013, 08:38 PMibduttRe: integral with radical and trigonometry