Which of the following equals sin(π/6)?

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Multiple Choice

Which of the following equals sin(π/6)?

Explanation:
Sin of an angle on the unit circle equals the y-coordinate of the point corresponding to that angle. For π/6 (30°), the point on the unit circle is (√3/2, 1/2), so the sine is 1/2. Equivalently, in a 30-60-90 triangle with hypotenuse 1, the side opposite the 30° angle is 1/2, giving sin(30°) = 1/2.

Sin of an angle on the unit circle equals the y-coordinate of the point corresponding to that angle. For π/6 (30°), the point on the unit circle is (√3/2, 1/2), so the sine is 1/2. Equivalently, in a 30-60-90 triangle with hypotenuse 1, the side opposite the 30° angle is 1/2, giving sin(30°) = 1/2.

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