trig
posted by John .
Find ALL solutions to the equation on the interval [0, 2pie]: 2sin(1/2X) = 1

sin(1/2x) = 1/2
1/2x = π/6 or 1/2x = 5π/6 , (30° or 150°)
x = π/3 or x = 5π/3 , (60° or 300°)
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