integral of sin(1-x)sinx dx
The Attempt at a Solution
so i did by parts once and got -sinxcos(1-x) - integral of -cos(1-x)cosx dx
then i did by parts again and got -sinxcos(1-x) + cosxsin(1-x) - integral of -sin(1-x)sinx dx
if you take out the negative on the last integral you end up where you started? any one know where i messed up?