Trigonometrymedium · Past Paper
Evaluate: 2 sin^2 30 + 3 cos^2 30
A2.5
B2.75
C3
D2.25
✓ Correct Answer: B — 2.75
2(1/2)^2 + 3(sqrt(3)/2)^2 = 2(1/4) + 3(3/4) = 1/2 + 9/4 = 2/4 + 9/4 = 11/4 = 2.75.
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✓ Correct Answer: B — 2.75
2(1/2)^2 + 3(sqrt(3)/2)^2 = 2(1/4) + 3(3/4) = 1/2 + 9/4 = 2/4 + 9/4 = 11/4 = 2.75.
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