# Math Help - [SOLVED] approximation problem

1. ## [SOLVED] approximation problem

I have this math problem that requires me to approximate an equation.
But I can't seem to get the answer. I tried to use Taylor's series but i'm not sure if it is correct. z<<1 to get the answer.
Can anyone help?
This is the equation
eqn1.gif

This is the approximated equation
eqn2.gif