If a vector vec(A) makes anangle alpha , betaand gammawith X,Y and Z axis respectively then sin ^(2) alpha +sin^(2) beta +sin ^(2)gamma =....

If a vector vec(A) makes anangle alpha , betaand gammawith X,Y and Z a

1.	If a vector vec(A) makes anangle alpha , betaand gammawith X,Y and Z axis respectively then sin ^(2) alpha +sin^(2) beta +sin ^(2)gamma =....
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