Question

find the derivative of sin(sin(sinx))

Answer 1

Apply chain rule 3 times

Answer 2

use chain rule
u = sin(sin(x))
u' = cos(sin(x))*cos(x)

cos(sin(sinx)) * u'

f'(x) = cos(sin(sinx))cos(sin(x))*cos(x)

Answer 3

thanks