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Question
If a directed line L passing through the origin makes angles α, β and y with x, y and z-axes, respectively, called direction angles, then what are cosα, cosβ, and cosy called?
If a directed line L passing through the origin makes angles α, β and y with x, y and z-axes, respectively, called direction angles, then what are cosα, cosβ, and cosy called?
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Solution
The correct option is B direction cosines of the directed line L.
If a directed line L passing through the origin makes angles α, β and y with x, y and z-axes, respectively, called direction angles, then cosine of these angles, namely, cosα, cosβ, and cosy are called direction cosines of the directed line L
direction cosines of the directed line L.
If a directed line L passing through the origin makes angles α, β and y with x, y and z-axes, respectively, called direction angles, then cosine of these angles, namely, cosα, cosβ, and cosy are called direction cosines of the directed line L
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