Question

how do you integrate (sin(x))^2 without using the trigo identity cos(2x)=1-2(sin(x))^2

Answer 1

can we there use anyother trigo identity

Answer 2

erm... u cant use any trigo identity or integrating it by parts

Answer 3

yeah integraion by parts give our result

Answer 4

Maybe U-substitution for this one?

Answer 5

is it impossible to integrate this without using trigo identity or intergration by parts?
can we use chain rule and integrate it into \[-1/3\cos^3(x)\]

Answer 6

http://youtu.be/qclrs-1rpKI?t=3m32s

Answer 7

ok i understand now thankyou

Answer 8

You can also use the good ol' table of integrals but I'm sure your teacher doesn't want that.

http://integral-table.com/integral-table.html#SECTION00007000000000000000