Find the 2nd Derivative y=cos(x)

The derivative of with respect to is .
Find the second derivative.
Since is constant with respect to , the derivative of with respect to is .
The derivative of with respect to is .
Find the third derivative.
Since is constant with respect to , the derivative of with respect to is .
The derivative of with respect to is .
Multiply.
Multiply by .
Multiply by .
The derivative of with respect to is .
Find the 2nd Derivative y=cos(x)

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