What is the second derivative value for the function g(x)=sin (9x)?
We have the function g(x) = sin 9x.
We have to find the second derivative of g(x). We use the chain rule here.
g(x) = sin 9x
=> g'(x) = 9 cos 9x
=> g''(x) = -81 sin 9x
The required second derivative is -81 sin 9x
check Approved by eNotes Editorial