Let .
Then, apply the chain rule. Multiply by :
Let .
The derivative of sine is cosine:
Then, apply the chain rule. Multiply by :
Differentiate term by term:
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 derivative of the constant is zero.
The result is:
The result of the chain rule is:
The result of the chain rule is:
Now simplify:
The answer is:
sin(7*x - 2) 7*9 *cos(7*x - 2)*log(9)
sin(-2 + 7*x) / 2 \ 49*9 *\-sin(-2 + 7*x) + cos (-2 + 7*x)*log(9)/*log(9)
sin(-2 + 7*x) / 2 2 \ 343*9 *\-1 + cos (-2 + 7*x)*log (9) - 3*log(9)*sin(-2 + 7*x)/*cos(-2 + 7*x)*log(9)