## Precalculus (6th Edition)

Note that: $\dfrac{\sqrt2}{\sqrt2} = 1$ and $\dfrac{1}{\sqrt2} = \dfrac{2}{\sqrt2}$ RECALL: The Identity Property of Multiplication states that for any real number $a$, $a \cdot 1 = a$. With $a=\dfrac{1}{\sqrt2}$, the given expression illustrates the Identity Property of Multiplication.