Question

What is the derivative of `arctan(x/a)`?

Answer 1

`d/dx[arctan(x/a)]=[1/a]/[1+(x/a)^2]=1/[a(1+(x/a)^2)]`

Explanation:

show below

`d/dx[arctan(x/a)]=[1/a]/[1+(x/a)^2]=1/[a(1+(x/a)^2)]`