Trigonometrymedium · Past Paper

If sin A = 1/2, then the value of sin 3A is:

A1
B1/2
C0
D3/4

✓ Correct Answer: A1

sin 3A = 3 sin A - 4 sin³ A = 3(1/2) - 4(1/8) = 1.5 - 0.5 = 1.

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