Solve the equation for solutions in the interval


Problem:

Trigonometry

Solve the equation for solutions in the interval [0, 360).

cos 2x= √3/2

Which is the correct answer?

x = 15, 165, 195, 345
x = 30, 90, 150, 270
x = 0, 120, 180, 240
x = 105, 165, 285, 345.

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Mathematics: Solve the equation for solutions in the interval
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