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MATHEMATICS

JAMB 2020 - Question 22

Mathematics 2020 JAMB Past Questions - Question 22: find the lenght XZ in the triangle above

Use the diagram to answer question that follows

find the lenght XZ in the triangle above

A: √7m

B: √6m

C: √5m

D: √3m

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Correct Answer

Explanation

(x2)² = 2² + 1² - 2X 2 X 1 cos 120⁰ = 4 + 1+ 4 cos 60⁰ = 5 + 4 X 1/2 = x2 = √