Neco 2019 Mathematics Question 5
Practice objective / multiple choice question 5 from the 2019 Neco Mathematics examination.
Vectors \(\mathbf{a}\) and \(\mathbf{b}\) satisfy \(|\mathbf{a}|=5\), \(|\mathbf{b}|=7\). The vector \(\mathbf{c}=2\mathbf{a}-\mathbf{b}\) is perpendicular to \(\mathbf{d}=\mathbf{a}+3\mathbf{b}\). Find the angle between \(\mathbf{a}\) and \(\mathbf{b}\) in degrees, correct to the nearest integer.
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About This Question
This is Neco 2019 Mathematics Question 5. It is one of the objective questions from the 2019 Neco Mathematics examination.
Difficulty level: Hard .
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