Question

Integrate : sinx - sin2x

Answer 1

-cos(x)+cos(2x)/2

Answer 2

rewrite sin2x as 2sinxcosx

Answer 3

yes, i did that
i thought i would have to use substitution

Answer 4

yeah u-sub should take care of it

Answer 5

or better yet, just remember it because math teachers seem to love this one.
\[\int\sin(2x)dx=-\frac{1}{2}\cos(2x)\]
\[\int \ln(x)dx=x\ln(x)-x\] save you fifteen minutes an exam really

Answer 6

ok let me see

Answer 7

ill try both ways....la grange, would i take out a sinx once i rewrite the equation?

Answer 8

you could or you could simply write two integrals