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If \vec { A } = 8 \hat { i } + 6 \hat { ...

If `\vec { A } = 8 \hat { i } + 6 \hat { j }` and `\vec { B } = 4 \hat { \i } + 2 \hat { j }`. Then find `| \vec { A } + \vec { B } |`

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Knowledge Check

  • If vec a = 2 hat i + 3 hat j + a hat k and vec b = 3 hat i - a hat j + 2 hat k , then the angle between vec a + vec b and vec a - vec b is equal to

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    B
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    C
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    D
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  • If vec a = hat i + 2 hat j - 3 hat k and vec b = 3 hat i - hat j + 2 hat k , then vec a + vec b and vec a - vec b are

    A
    parallel vectors
    B
    perpendicular vectors
    C
    zero vectors
    D
    None of these

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