2021 WAEC MATHEMATICS ANSWERS

MATHEMATICS OBJ:
01-10: CBCADABBCD
11-20: ACBADACABC
21-30: CDCAAADACD
31-40: CADACBAABC
41-50: ABAADADBBB

WAEC

2a.
|Hyp|² = |opp|² + |adj|²

X² = 20²+15²
X²=400+225
X²=625
X √625 =25KM

2b.
The bearing of Y from Z

cos Y = x²+z²-y²
_
2xz

costita = 25²+15²-20²
_
2 * 25 * 15
Costita = 450
__

750

Costita = 0.6

Tita = cos-¹ (0.6)
Tita = 53.13⁰

:. The bearing of Y from Z is (360-53.13)
=306.87
≈307⁰

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