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If a line has direction ratios -18,12,-4...

If a line has direction ratios `-18,12,-4`, then what are its direction cosines ?

Text Solution

Verified by Experts

The correct Answer is:
`((-9)/(11),(6)/(11),(-2)/(11))" or "((9)/(11),(-6)/(11),(2)/(11))`
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Knowledge Check

  • If a line has direction ratios lt-2,-1,2gt then its direction - cosines are

    A
    `lt(2)/(3),(-1)/(3),(-2)/(3)gt`
    B
    `lt(-2)/(3),(-1)/(3),(2)/(3)gt`
    C
    `lt(-2)/(3),(-1)/(3),(-2)/(3)gt`
    D
    None of these

  • If a line has direction ratios (2,-1,-2) , then its drection cosines are

    A
    `(2/3,-1/3,(-2)/(3))`
    B
    `(-(2)/(3),-1/2,2/3)`
    C
    `(-2/3,-1/3,(-2)/(3))`
    D
    None of these

  • If a line has direction ratios (2,-1,-2) , then its drection cosines are

    A
    `(2/3,-1/3,(-2)/(3))`
    B
    `(-(2)/(3),-1/2,2/3)`
    C
    `(-2/3,-1/3,(-2)/(3))`
    D
    None of these

    • Similar Questions

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