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A line makes angle a,b,c and …

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A line makes angle a,b,c and d with the diagonals of a cube then prove that Cos square a + cos square b + cos square c +cos square d =4/3

    • Posted by Jatin Dalal 7 years, 8 months ago

    CBSE > Class 12 > Mathematics
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    Manish Bakshi 7 years, 8 months ago

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