Hi, I can't integrate sin x cos x. I tried a u substitution with u=sinx and dx=cos x du and got 1/2(sin x)^2+c. My text book answer is -1/4cos 2x+c.

Can someone please show where I am going wrong?

Is my u substitution wrong?

Thank you

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- July 5th 2009, 04:38 PMslaypullingcattrig integration
Hi, I can't integrate sin x cos x. I tried a u substitution with u=sinx and dx=cos x du and got 1/2(sin x)^2+c. My text book answer is -1/4cos 2x+c.

Can someone please show where I am going wrong?

Is my u substitution wrong?

Thank you - July 5th 2009, 04:52 PMskeeter
- July 5th 2009, 04:53 PMVonNemo19
- July 5th 2009, 05:00 PMslaypullingcat
- July 5th 2009, 05:15 PMskeeter

can you get the textbook solution from this? - July 5th 2009, 06:49 PMslaypullingcat