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January 27, 2015

January 27, 2015

Posted by **mary** on Wednesday, November 19, 2008 at 2:47pm.

am i using integration by parts?

- anti derivative -
**drwls**, Wednesday, November 19, 2008 at 3:39pmNo. Use substitution.

Let u = cos x. Then du = -sin x dx

The integral becomes that of

u^2 du, which is u^3/3

After substituting back, that becomes (cos^3 x)/3

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