0,5cos(3x-pi/6)
/ pi\
cos|3*x - --|
\ 6 /
-------------
2
/ / pi\\ |cos|3*x - --|| d | \ 6 /| --|-------------| dx\ 2 /
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:
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:
So, the result is:
Now simplify:
The answer is:
/ pi\
-3*sin|3*x - --|
\ 6 /
----------------
2
/ pi\
-9*sin|3*x + --|
\ 3 /
----------------
2
/ pi\
-27*cos|3*x + --|
\ 3 /
-----------------
2