Waec Model Questions Vol1 2019 Mathematics Question 11
Practice objective / multiple choice question 11 from the 2019 Waec Model Questions Vol1 Mathematics examination.
In a plane, vectors **a** and **b** have magnitudes |a| = 7 cm and |b| = 5 cm respectively. If the vector **a** - 2**b** is perpendicular to the vector **a** + **b**, find the value of cos θ, where θ is the angle between **a** and **b**.
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About This Question
This is Waec Model Questions Vol1 2019 Mathematics Question 11. It is a objective / multiple choice question from the 2019 Waec Model Questions Vol1 Mathematics examination.
Difficulty level: Hard .
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