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Standard XII

Mathematics

Direction Cosines

If a directed...

Question

If a directed line L₁ passing through the origin makes angles α, β, and y with x, y and z-axes, respectively, then what are the direction cosines of a line L₂ , in the reverse direction of line L₁

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Solution

The correct option is C

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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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If a directed line L1 passing through the origin makes angles α, β, and y with x, y and z-axes, respectively, then what are the direction cosines of a line L2 , in the reverse direction of line L1

The correct option is C

If a directed line L₁ passing through the origin makes angles α, β, and y with x, y and z-axes, respectively, then what are the direction cosines of a line L₂ , in the reverse direction of line L₁