Do I just straight up integrate (x + cosx)? and to change my interval do I plug Pi/2 and Pi/3 to cos(x)??

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- Dec 13th 2012, 10:19 PMasilvester635Integration question
Do I just straight up integrate (x + cosx)? and to change my interval do I plug Pi/2 and Pi/3 to cos(x)??

- Dec 13th 2012, 10:49 PMearbothRe: Integration question
- Dec 13th 2012, 10:57 PMasilvester635Re: Integration question
awesome... so we didn't have to change the interval of Pi/2 and Pi/3, because usually that's what I'm used to doing..... So since we can't further simplify this equation we just leave it as it is??

- Dec 13th 2012, 11:48 PMMarkFLRe: Integration question
You only change the limits of integration if you have made a substitution. Then you write those limits in terms of the new variable.

- Dec 14th 2012, 08:41 AMhollywoodRe: Integration question
Sometimes when I'm doing a substitution on a definite integral, I'll write $\displaystyle \int_{x=a}^{x=b}f(x)\ dx$ so that I remember to change the limits of integration when I do the substitution.

- Hollywood