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19 September, 19:09

Determine whether the expression make sense mathematically, if not explain why.

a) ||u|| * ||v||

b) (u * v) - w

c) (u * v) - k

d) k * u

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Answers (2)
  1. 19 September, 20:23
    0
    ||u|| x ||v|| does noot make sence mathematically because you cannot do the cross product of two scalars.

    (u x v) - w makes sence mathematically because the cross product of two vectors is a vector from which another vector can be subtracted.

    (u x v) - k does not makes sence mathematically because the cross product of two vectors is a vector from which a scalar cannot be subtracted.

    k x u does not make sense mathematically because, you cannot have the cross product of a scalar and a vector.
  2. 19 September, 23:02
    0
    Sec=1/cos and cot = cos/sinso, if sec >0, so theta should be in I or IV quadrant, but you have cot <0, which means that sin should be <0it will leave you with IV quadrant as an answer
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