pi -- 3 / | | 1 | ------------------ dx | 2 | (sin(x) + cos(x)) | / 0
Integral(1/((sin(x) + cos(x))^2), (x, 0, pi/3))
/ /x\ | 2*tan|-| | 1 \2/ | ------------------ dx = C - ----------------------- | 2 2/x\ /x\ | (sin(x) + cos(x)) -1 + tan |-| - 2*tan|-| | \2/ \2/ /
___ -2*\/ 3 ----------------- / ___\ | 2 2*\/ 3 | 3*|- - - -------| \ 3 3 /
=
___ -2*\/ 3 ----------------- / ___\ | 2 2*\/ 3 | 3*|- - - -------| \ 3 3 /
-2*sqrt(3)/(3*(-2/3 - 2*sqrt(3)/3))
Use the examples entering the upper and lower limits of integration.