waec model questions vol6 2024 mathematics
Objective • Question 12
Question 12
WAEC_MODEL_QUESTIONS_VOL6
•
2024
Vectors a and b lie in a plane with magnitudes |a| = 5 and |b| = 8. If the vector (2a - b) is perpendicular to (a + 2b), determine the angle between a and b in degrees, correct to the nearest integer.
Answer Options
A.
30
Correct Answer
B.
50
C.
70
D.
60
Correct Answer
B
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