関連ワード:  what is the integral of tan^2x    what is the integral of tan 2x    what is the antiderivative of tan 2x    what is the integral of 1 tan 2x    what is the integral of tan 2 2x    what is the integration of tan 2 2x 3    what is the integral of sec 2x tan 2x    what is the integral of tanx sec 2x    what is the integral of tan 2 x dx    what is the integration of 1 tan 2 x