/pi*t\
pi*sin|----|
\ 3 /
d / /pi*t\\ --|pi*sin|----|| dt\ \ 3 //
The derivative of a constant times a function is the constant times the derivative of the function.
Let .
The derivative of sine is cosine:
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:
2 /pi*t\
pi *cos|----|
\ 3 /
-------------
3
3 /pi*t\
-pi *sin|----|
\ 3 /
---------------
9
4 /pi*t\
-pi *cos|----|
\ 3 /
---------------
27