Waec Model Questions Vol1 2020 Mathematics Question 12
Practice objective / multiple choice question 12 from the 2020 Waec Model Questions Vol1 Mathematics examination.
In the plane, let vector \(\mathbf{a}\) have magnitude 5 and lie along the positive x‑axis. Vector \(\mathbf{b}\) has magnitude 8 and makes an angle of 60° with \(\mathbf{a}\). A third vector \(\mathbf{c}\) has magnitude 7 and satisfies \((\mathbf{a}+\mathbf{c})\) \(\perp\) \(\mathbf{b}\). Find the greatest possible magnitude of \(\mathbf{a}+\mathbf{b}+\mathbf{c}\). Give your answer to one decimal place.
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About This Question
This is Waec Model Questions Vol1 2020 Mathematics Question 12. It is a objective / multiple choice question from the 2020 Waec Model Questions Vol1 Mathematics examination.
Difficulty level: Hard .
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