4*cos(x - 1) e
d / 4*cos(x - 1)\ --\e / dx
Let .
The derivative of is itself.
Then, apply the chain rule. Multiply by :
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 :
Differentiate term by term:
Apply the power rule: goes to
The derivative of the constant is zero.
The result is:
The result of the chain rule is:
So, the result is:
The result of the chain rule is:
Now simplify:
The answer is:
4*cos(x - 1) -4*e *sin(x - 1)
/ 2 \ 4*cos(-1 + x) 4*\-cos(-1 + x) + 4*sin (-1 + x)/*e
/ 2 \ 4*cos(-1 + x) 4*\1 - 16*sin (-1 + x) + 12*cos(-1 + x)/*e *sin(-1 + x)