y(x)=3e^-3cos(3x)
3*cos(3*x) ---------- 3 e
d /3*cos(3*x)\ --|----------| dx| 3 | \ e /
The derivative of a constant times a function is the constant times the derivative of the function.
Let .
The derivative of cosine is negative sine:
Then, apply the chain rule. Multiply by :
The derivative of a constant times a function is the constant times the derivative of the function.
Apply the power rule: goes to
So, the result is:
The result of the chain rule is:
So, the result is:
The answer is: