3-d

Question: The direction cosines of the line joining the points (4, 3, – 5) and (– 2, 1, – 8) are

1) $\left( \frac{6}{7},\frac{2}{7},\frac{3}{7} \right)$

2) $\left( \frac{2}{7},\frac{3}{7},\frac{6}{7} \right)$

3) $\left( \frac{6}{7},\frac{3}{7},\frac{2}{7} \right)$

4) None of these

Solution:

Explanation: No Explanation

System of co-ordinates Direction cosines and direction ratios Projection

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