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 one of the objective questions from the 2020 Waec Model Questions Vol1 Mathematics examination.
Difficulty level: Hard .
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