vectors-m

Question: If a, b, c are mutually perpendicular vectors of equal magnitudes, then the angle between the vectors a and $\mathbf{a}+\mathbf{b}+\mathbf{c}$ is

1) $\frac{\pi }{3}$

2) $\frac{\pi }{6}$

3) ${{\cos }^{-1}}\frac{1}{\sqrt{3}}$

4) $\frac{\pi }{2}$

Solution:

Explanation: No Explanation

Scalar Product Dot Product

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