1 / | | (4*sin(x) + 2*cos(x))*1 dx | / 0
/ | | (4*sin(x) + 2*cos(x))*1 dx = C - 4*cos(x) + 2*sin(x) | /
4 - 4*cos(1) + 2*sin(1)
=
3.52173274614323
Use the examples entering the upper and lower limits of integration.