Question

If $|\bar{a}|=\sqrt{14},|\bar{b}|=\sqrt{10},|\bar{a}-\bar{b}|=\sqrt{24}\ and\ \theta$ is angle between $\bar{a}\ and\ \bar{b}$, then $\cos\theta=$

• A. $\frac{\sqrt{35}}{70}$
• B. $\frac{\sqrt{6}}{12}$
• C. $\frac{\sqrt{15}}{60}$
• D. $\frac{\sqrt{210}}{35}$
• E. 0

Answer 1

Answer: (E)

0

Answer 2

The correct option is (E) : 0