Math, asked by prakashgaming989, 3 months ago

A line makes angles theta 1 , theta 2 , theta 3 and theta 4 cos^ 2 theta 1 +cos^ 2 theta 2 +cos^ 2 theta 3 +cos^ 2 theta 4 = 4 3 with the diagonals of a cube show that

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Answered by Angelrai168

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