evaluate integrals:

{ (pie/2,0) ( (1+cos2t)/2 )dt

cos2t = 2 (cost)^2 - 1

so,

{ (pie/2,0) (cost)^2 dt

but how do you approach this problem after this step?

i forgot the anti derivative of (cost)^2 ...someone help ~ do it for me so i can see

thx