ddxtan3x=\dfrac{d}{dx}\tan^3 x =dxdtan3x=A3tan2xsec2x3\tan^2 x \sec^2 x3tan2xsec2xcheck_circleB3tan2x3\tan^2 x3tan2xC3sec2x3\sec^2 x3sec2xD3tan3xsecx3\tan^3 x \sec x3tan3xsecxExplanation3tan2x⋅sec2x3\tan^2 x \cdot \sec^2 x3tan2x⋅sec2x.