What is the derivative of this function #y = sin ^ -1 (x^2)?

1 Answer
Aug 13, 2017

#y'(x) = (2x)/(sqrt(1-x^4))#

Explanation:

We're asked to find the derivative

#(dy)/(dx) [sin^-1(x^2)]#

Let's use the chain rule first:

#d/(dx) [sin^-1(x^2)] = d/(du) [sin^-1u] (du)/(dx)#

where

  • #u = x^2#

  • #d/(du) [sin^-1u] = 1/(sqrt(1-u^2))#:

#y'(x) = (d/(dx)[x^2])/(sqrt(1-x^4))#

The derivative of #x^2# is #2x# (according to the power rule):

#color(blue)(ulbar(|stackrel(" ")(" "y'(x) = (2x)/(sqrt(1-x^4))" ")|)#