pi / | | 2 | (3*cos(5*x)) dx | / pi -- 2
Integral((3*cos(5*x))^2, (x, pi/2, pi))
/ | 2 2 | 2 9*x*cos (5*x) 9*x*sin (5*x) 9*cos(5*x)*sin(5*x) | (3*cos(5*x)) dx = C + ------------- + ------------- + ------------------- | 2 2 10 /
9*pi ---- 4
=
9*pi ---- 4
Use the examples entering the upper and lower limits of integration.