1.

The direction cosines of a line are k, k, k, then(a) k > 0 (b) 0 < k < 1 (c) k = 1 (d) k=13 or -13

Answer»

The direction cosines of a line are k, k, k, then

(a) k > 0

(b) 0 < k < 1

(c) k = 1

(d) k=13 or -13



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