# What is 1 over square root of 5?

Sep 8, 2015

$\frac{1}{\sqrt{5}} = 0.447214$
There really is not a simple way to evaluate $\sqrt{5}$ other than by using a calculator (or some similar technology).
$\sqrt{5} \approx 2.236068$ (using calculator)
$\frac{1}{\sqrt{5}} \approx 0.447214$ (this could have been done by hand, but I had the calculator out already)