UPSC NDA I 2014 Mathematics Paper
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For the next two (02) items that follow:
Let a vector r make angles 60°,30° with x and y-axes respectively.
Let a vector r make angles 60°,30° with x and y-axes respectively.
[NDA I 2014]
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What angle does r make the Z-axis ?
[NDA I 2014]
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