Gce Model Questions Vol1 2021 Mathematics Question 42
Practice objective / multiple choice question 42 from the 2021 Gce Model Questions Vol1 Mathematics examination.
Two vectors \(\mathbf{a}\) and \(\mathbf{b}\) lie in a plane with magnitudes \(|\mathbf{a}| = 5\) and \(|\mathbf{b}| = 7\). The vector \(\mathbf{c}=2\mathbf{a}-\mathbf{b}\) is perpendicular to the vector \(\mathbf{d}=\mathbf{a}+3\mathbf{b}\). Find \(\cos\theta\), where \(\theta\) is the angle between \(\mathbf{a}\) and \(\mathbf{b}\).
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About This Question
This is Gce Model Questions Vol1 2021 Mathematics Question 42. It is one of the objective questions from the 2021 Gce Model Questions Vol1 Mathematics examination.
Difficulty level: Hard .
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