Approximately equal expressions

I have made the following approximate expression. This expression is not accurate and equal but only approximately equal.

Here are the Wolfram screenshots which confirm my above statement.

You may recall that I have done approximately correct geometry and expressions. I am providing the links below. This is because approximate correctness is close to my heart. And I believe this is what a human being is all about. Being approximately correct. And today I have the fifth approximately correct expression.

 Approximately drawing a pentagon

Binomials approximated to Arithmetic Geometric Progression

Approximately finding x by a to the power n

An interesting approximation

Hope you all have a nice day !!