I'm having problems integrating

the answer in the book is

I can't see how this answer is obtained.

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- Jul 5th 2006, 12:12 PMmacca101integration
I'm having problems integrating

the answer in the book is

I can't see how this answer is obtained. - Jul 5th 2006, 12:16 PMJameson
Let u=cos(x) and du=-sin(x)

This becomes

When you integrate this, the negatives cancel out and you get or - Jul 5th 2006, 12:24 PMmacca101
Tremendous :D

Thanks Jameson - Jul 5th 2006, 02:34 PMSoroban
Hello, macca101!

Another method . . .

Quote:

The answer in the book is: .

I'm surprised that they left the answer like that . . .

We have: .