Trigonometryhard · Past Paper
What is the value of sin 10° sin 50° sin 70°?
A1/4
B1/8
C1/16
D√3/8
✓ Correct Answer: B — 1/8
Using sin θ sin(60-θ) sin(60+θ) = 1/4 sin 3θ, with θ=10, we get 1/4 sin 30 = 1/8.
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