関連ワード:  what is the integral of inverse tanx    what is the integral of 1 tanx    what is the derivative of inverse tanx    what is the integral of inverse tangent    what is the integral of inverse cosine    what is the derivative of 1 tanx    antiderivative of 1/tan x    what is the derivative of inverse tangent    what is the derivative of inverse cosine    what is the antiderivative of inverse tangent