関連ワード:  what is the integral of sec^2x    what is the integral of sec 2x tanx    integral of sec^2x tanx    what is the antiderivative of sec 2x    what is the integral of secant 2x    what is the integral of 1 sec 2x    what is the integral of sec 2 2x    what is the integral of sec 2x dx    what is the integral of sec 2x tan 2x    antiderivative of sec^2(2x)