Answer
$a$
Work Step by Step
Let's assume that reciprocal of $\frac{1}{a}$ is '$ x$'.
By definition, product of a number and its reciprocal is always 1. Therefore-
$ (\frac{1}{a})\times x $ = 1
$x$ = $\frac{1}{(\frac{1}{a})}$
or $ x$ = $a$
i.e. reciprocal of $\frac{1}{a}$ is $a$
