3 -cot (x) --------- 3
/ 3 \ d |-cot (x) | --|---------| dx\ 3 /
The derivative of a constant times a function is the constant times the derivative of the function.
Let .
Apply the power rule: goes to
Then, apply the chain rule. Multiply by :
There are multiple ways to do this derivative.
Rewrite the function to be differentiated:
Let .
Apply the power rule: goes to
Then, apply the chain rule. Multiply by :
Rewrite the function to be differentiated:
Apply the quotient rule, which is:
and .
To find :
The derivative of sine is cosine:
To find :
The derivative of cosine is negative sine:
Now plug in to the quotient rule:
The result of the chain rule is:
Rewrite the function to be differentiated:
Apply the quotient rule, which is:
and .
To find :
The derivative of cosine is negative sine:
To find :
The derivative of sine is cosine:
Now plug in to the quotient rule:
The result of the chain rule is:
So, the result is:
Now simplify:
The answer is:
2 / 2 \ -cot (x)*\-3 - 3*cot (x)/ -------------------------- 3
/ 2 \ / 2 \ -2*\1 + cot (x)/*\1 + 2*cot (x)/*cot(x)
/ 2 \ / 2 \ |/ 2 \ 4 2 / 2 \| 2*\1 + cot (x)/*\\1 + cot (x)/ + 2*cot (x) + 7*cot (x)*\1 + cot (x)//