Hi - I'd appreciate it if someone could point out where i'm going wrong on this one:
Intergrate within the limits of pi/2 and 0
(sinx)^3 * (cosx)^2 dx
Ok, use the identity (sinx)^2 = 1 - (cosx)^2
and I get sinx(cosx)^2 - sinx(cosx)^4
Intergrate and i get:
-1/3(cosx)^3 + 1/5(cosx)^5
Evaluate within the limits and I get zero as cos pi/2 equals zero.
This isnt the answer i get on an itegration calculator???