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[" 03.If a vector "vec P" make angles "a...

[" 03.If a vector "vec P" make angles "alpha,beta" and "gamma" respectively with "],[" the "x," y and "z" -axis.Then "sin^(2)alpha+sin2 beta+sin gamma=],[" 1) "0],[" 3) "2quad " 2) "1],[" 4) "3]

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