1.integration of tan^-1(secx+tanx)
2.tan^-1(2cos^2theta/2-2-sin2theta)sec^2theta
2.integration of (1+2tanx(tanx+secx)^1/2
1.integration of tan^-1(secx+tanx)
2.tan^-1(2cos^2theta/2-2-sin2theta)sec^2theta
2.integration of (1+2tanx(tanx+secx)^1/2