integrate things for me!!Watch
please - my p3 exam is tomorrow - eek!!!!
rep if you want it!!
use the cos2x = 2cos^2 x - 1 = 1 - 2sin^2 x
(yes i would like rep )
cos(2x) = cos^2(x) - sin^2(x)
Which means that
cos(2x) = 1 - 2sin^2(x) and cos(2x) = 2cos^2(x) - 1
sin^2(x) = ( 1-cos(2x) )/2 and cos^2(x) = ( 1+cos(2x) )/2
which you can use to integrate sin^2(x) and cos^2(x). I hope this helps.