Respuesta :

[tex]\frac{d}{dx}(tan^{3}x) = \frac{d}{dx}(tanx)^{3}[/tex]
[tex]= 3(tanx)^{2} \cdot sec^{2}x[/tex]

[tex]\therefore \frac{d}{dx}(tan^{3}x) = 3tan^{2}x \cdot sec^{2}x[/tex]