Practicing Success
Practicing Success
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The projections of a line segment on the coordinate axes are 12, 4, 3 respectively. The length and direction cosines of the line segment are |
$13; \frac{12}{13}, \frac{4}{13}, \frac{3}{13}$ $19; \frac{12}{19}, \frac{4}{19}, \frac{3}{19}$ $11; \frac{12}{11}, \frac{14}{11}, \frac{3}{11}$ none of these |
$13; \frac{12}{13}, \frac{4}{13}, \frac{3}{13}$ |
Length of the line segment $= \sqrt{12^2 + 4^2 + 3^2}= 13 $ ∴ Direction cosines are $\frac{12}{13}, \frac{4}{13}, \frac{3}{13}$ |
