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Let bara, barb and barc be mutually orth...

Let `bara, barb and barc` be mutually orthogonal vectors of equal magnitudes. Prove that the vector `bara+barb+barc` is equally inclined to each of `bara, barb and barc`, the angle of inclination being `cos^(-1)" 1/sqrt3`

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The correct Answer is:
`Cos^(-1)(1)/(sqrt(3))` with `barb" and "barc`.
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SRISIRI PUBLICATION-PRODUCT OF VECTORS-2 D (VSAQ, SAQ,LAQ)
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