Waec Model Questions Vol1 2019 Mathematics Question 11

Practice objective / multiple choice question 11 from the 2019 Waec Model Questions Vol1 Mathematics examination.

Waec Model Questions Vol1 2019 Mathematics Objective / Multiple Choice Hard Difficulty
Question 11 WAEC_MODEL_QUESTIONS_VOL1 • 2019 • MATHEMATICS • objective

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**.

Answer Options

A. \(1/35\)
B. \(5/35\)
C. \(-1/7\)
Correct Answer D. \(-1/35\)
Correct Answer
D
Correct Option:
\(-1/35\)

About This Question

This is Waec Model Questions Vol1 2019 Mathematics Question 11. It is one of the objective questions from the 2019 Waec Model Questions Vol1 Mathematics examination.

Difficulty level: Hard .

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