Neco Model Questions Vol1 2020 Mathematics Question 43
Practice objective / multiple choice question 43 from the 2020 Neco Model Questions Vol1 Mathematics examination.
In the plane, vectors \(\mathbf{u} = (2,\,-1)\) and \(\mathbf{v} = (k,\,5)\) satisfy that the magnitudes of \(\mathbf{u}+\mathbf{v}\) and \(\mathbf{u}-\mathbf{v}\) are equal. (i) Determine the value of \(k\). (ii) Find the angle between \(\mathbf{u}\) and \(\mathbf{v}\) in degrees. (iii) Find the magnitude of the resultant vector \(\mathbf{u}+\mathbf{v}\) (give your answer to two decimal places).
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This is Neco Model Questions Vol1 2020 Mathematics Question 43. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Mathematics examination.
Difficulty level: Hard .
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