The direction ratios of a line are 2,6,-9. What are its direction | Filo
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Class 12

Math

3D Geometry

Three Dimensional Geometry

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The direction ratios of a line are . What are its direction cosines?

Solution:
We know that if and are the direction ratios, then the direction cosines and are given by
Direction cosines are

The direction ratios of a line are .
We have
Direction cosines of the given line are
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