Problem
\( \begin{array}{c}\sin \theta=\sqrt{\frac{1}{10}} \\ \sin \theta=\frac{1}{\sqrt{10}} \cdot \frac{\sqrt{10}}{\sqrt{10}} \\ \sin \theta=\frac{\sqrt{10}}{10}\end{array} \)
Solution
Step 1 ：\( \sin \theta = \sqrt{\frac{1}{10}} \)
Step 2 ：\( \sin \theta = \frac{1}{\sqrt{10}} \cdot \frac{\sqrt{10}}{\sqrt{10}} \)
Step 3 ：\( \sin \theta = \frac{\sqrt{10}}{10} \)
