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# Can anyone help me with these two integrals? watch

1. Hi,

I originally posted this in the hard integrals thread but have been told to move it to its own thread here.

I was given some basic calculus revision questions to do for an undergrad module, but since there's nothing new in them I decided to give it an A-level tag. I've been working on them for a while now, but I'm stuck at these two. Any help would be appreciated; I'm not particularly bothered if you want to post the answers as it's not an assessed homework, and I'm starting to get tired of these. :/

Cheers,

Tim
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2. (Original post by TimGB)
Hi,

I originally posted this in the hard integrals thread but have been told to move it to its own thread here.

I was given some basic calculus revision questions to do for an undergrad module, but since there's nothing new in them I decided to give it an A-level tag. I've been working on them for a while now, but I'm stuck at these two. Any help would be appreciated; I'm not particularly bothered if you want to post the answers as it's not an assessed homework, and I'm starting to get tired of these. :/

Cheers,

Tim
35 switch hyperbolic into exponentials, then integration by parts

or complex numbers (too advanced for A level perhaps)

37
rewrite as cosec4x and use identities on one of the cosec2x
3. (Original post by TeeEm)
35 switch hyperbolic into exponentials, then integration by parts

or complex numbers (too advanced for A level perhaps)

37
rewrite as cosec4x and use identities on one of the cosec2x
Thanks. I'll give these a try tomorrow once my brain's had a chance to rest.
4. Here are the broad strokes for Q37:

You should know how to integrate cosec ^2 x wrt x.

For the integral of cosec ^2 x * cot ^2 x wrt x, consider the structure of the integral [f(x)]^n * f(x), where f(x) =cot x and n=2.

Hope this helps. Peace.
5. I wrote a reply in the other thread (just incase you didn't catch it).

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