1.

If `vec(A)` makes an angle `alpha, beta` and `gamma` from x,y and z axis respectively then `sin^(2)alpha+sin^(2) beta+sin^(2) gamma=`

Answer» Correct Answer - 3
`cos^(2) alpha+cos^(2) beta+cos^(2)gamma=1`
`1-sin^(2) alpha+1-sin^(2) beta+1-sin^(2) gamma=1`
`sin^(2) alpha+sin^(2) beta +sin^(2) gamma=2`


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