What are the direction cosines of the y-axis? | Filo
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3D Geometry

Three Dimensional Geometry

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What are the direction cosines of the y-axis?

If and are the angles made by the line segment with the coordinate axis.
and are called as the direction cosines and are usually denoted by and

Clearly the y-axis makes an angle of ie., with the x-axis, y-axis, z-axis respectively
so its direction cosines are ie.,
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