ddxarctanx=\dfrac{d}{dx}\arctan x =dxdarctanx=A11+x2\dfrac{1}{1+x^2}1+x21check_circleB11−x2\dfrac{1}{\sqrt{1-x^2}}1−x21C11−x2\dfrac{1}{1-x^2}1−x21Dsec2x\sec^2 xsec2xExplanationStandard inverse trig derivative.