Answer
$\dfrac{1}{2}$
Work Step by Step
Using the concepts of radicals, the given expression, $
\dfrac{1}{\sqrt{4}}
,$ is equivalent to
\begin{align*}\require{cancel}
&
\dfrac{1}{\sqrt{2^2}}
\\\\&=
\dfrac{1}{2}
.\end{align*}
Hence, the given equation simplifies to $
\dfrac{1}{2}
.$