Question

$$\frac{1}{\sqrt{2}}\times\frac{\sqrt{3}}{2}; -\frac{1}{\sqrt{2}}\times\frac{1}{\sqrt{2}}$$

Answer

sqrt(2)/2*sqrt(3)/2;-1/2

Solution


Rationalize the denominator: \(\frac{1}{\sqrt{2}} \cdot \frac{\sqrt{2}}{\sqrt{2}}=\frac{\sqrt{2}}{2}\).
\[\begin{aligned}&\frac{\sqrt{2}}{2}\times \frac{\sqrt{3}}{2}\\&-\frac{\sqrt{2}}{2}\times \frac{\sqrt{2}}{2}\end{aligned}\]
Use this rule: \(\frac{a}{b} \times \frac{c}{d}=\frac{ac}{bd}\).
\[\begin{aligned}&\frac{\sqrt{2}}{2}\times \frac{\sqrt{3}}{2}\\&-\frac{\sqrt{2}\sqrt{2}}{2\times 2}\end{aligned}\]
Simplify  \(\sqrt{2}\sqrt{2}\)  to  \(\sqrt{4}\).
\[\begin{aligned}&\frac{\sqrt{2}}{2}\times \frac{\sqrt{3}}{2}\\&-\frac{\sqrt{4}}{2\times 2}\end{aligned}\]
Since \(2\times 2=4\), the square root of \(4\) is \(2\).
\[\begin{aligned}&\frac{\sqrt{2}}{2}\times \frac{\sqrt{3}}{2}\\&-\frac{2}{2\times 2}\end{aligned}\]
Simplify  \(2\times 2\)  to  \(4\).
\[\begin{aligned}&\frac{\sqrt{2}}{2}\times \frac{\sqrt{3}}{2}\\&-\frac{2}{4}\end{aligned}\]
Simplify  \(\frac{2}{4}\)  to  \(\frac{1}{2}\).
\[\begin{aligned}&\frac{\sqrt{2}}{2}\times \frac{\sqrt{3}}{2}\\&-\frac{1}{2}\end{aligned}\]