Question

the derivative of f(x)=tan^-1(x)^3

Answer 1

Ok
d/(du) of tan-1(u) = 1/(1+u^2)

(tan-1(x))^3
u = tan-1(x)
du = 1/(1+x^2)

derivative: 3(tan-1(x))^2 (1/(1+x^2)
(don't forget chain rule - the du at the end)

Answer 2

im still getting the wrong answer