Trigonometrymedium · Past Paper
Simplify: (sin A + cos A)^2 - 1
Asin(2A)
Bcos(2A)
C2
D0
✓ Correct Answer: A — sin(2A)
(sin^2 A + cos^2 A + 2 sin A cos A) - 1 = 1 + sin(2A) - 1 = sin(2A).
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✓ Correct Answer: A — sin(2A)
(sin^2 A + cos^2 A + 2 sin A cos A) - 1 = 1 + sin(2A) - 1 = sin(2A).
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