Find the derivative of the function
Using the chain rule and the formula for the derivative of arctangent we have
This is valid for .
Find the derivative of the function
Using the chain rule and the formula for the derivative of arctangent we have
This is valid for .
Apostol 6.48 D arctanx valid for all real x.
The formula for the derivative of
is valid for all real
, but in this case we are looking at
and the expression
is not defined for
, so our formula is only good when
.