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If m (vec2+vecj+veck) is a unit vector t...

If m `(vec2+vecj+veck)` is a unit vector then the value of m is

A

`+-(1)/(sqrt(3))`

B

`+-(1)/(sqrt(5))`

C

`+-(1)/(sqrt(6))`

D

`+-(1)/(sqrt(2))`

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • If m(veci+vecj+veck) is a unit vector then value of m is:

    A
    `+- sqrt3`
    B
    `+-(1)/(sqrt3)`
    C
    `+-3`
    D
    `+-(1)/(3)`

  • Let the vectors vec a and vec b be such that |veca| = 3 and |vecb| = (sqrt2)/(3) , then vec a xx vec b is a unit vector, if the angle between veca and vec b is

    A
    `(pi)/(6)`
    B
    `(pi)/(4)`
    C
    `(pi)/(3)`
    D
    `(pi)/(2)`

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