Question

If angle between $\overrightarrow{i}-2\overrightarrow{j}+3\overrightarrow{k}$ and $2\overrightarrow{i}+\overrightarrow{j}+3\overrightarrow{k}$ is $\theta$ then $\sin\theta$ is equal to

• A. $\frac{5}{\sqrt7}$
• B. $\frac{5}{21}$
• C. $\frac{5}{2\sqrt7}$
• D. $\frac{5}{\sqrt14}$

Answer 1

Answer: (C)

$\frac{5}{2\sqrt7}$

Answer 2

The correct option is (C): $\frac{5}{2\sqrt7}$