3-d

Question: A line makes angles $\alpha ,\beta ,\gamma $ with the co-ordinate axes. If $\alpha +\beta ={{90}^{o}}$, then $\gamma =$



1) 0
2) $90{}^\circ $
3) $180{}^\circ $
4) None of these
Solution: Explanation: No Explanation
System of co-ordinates Direction cosines and direction ratios Projection

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