1.

If the direction cosines of a line are k, k and k,then (a) k>0 (b)0<k<1 (c) k=1 (d)k=1√3 or −1√3

Answer»

If the direction cosines of a line are k, k and k,then

(a) k>0 (b)0<k<1

(c) k=1 (d)k=13 or 13



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