2*atan(2) / | | 1 | -------------------- dx | 2 | (1 + cos(x))*sin (x) | / pi -- 2
Integral(1/((1 + cos(x))*sin(x)^2), (x, pi/2, 2*atan(2)))
/ /x\ 3/x\ | tan|-| tan |-| | 1 \2/ 1 \2/ | -------------------- dx = C + ------ - -------- + ------- | 2 2 /x\ 12 | (1 + cos(x))*sin (x) 4*tan|-| | \2/ /
Use the examples entering the upper and lower limits of integration.