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What is the coterminal angle of 37π/12 between 0 and 2π?

Answer and explanation

Correct answer: 13π/12

Direct answer: A, 13π/12. Coterminal angles have the same terminal side, so their difference is an integer multiple of one full revolution, 2π. The requested answer must lie strictly between 0 and 2π. Express one revolution with denominator 12: 2π = 24π/12. Subtract one revolution from the given angle: 37π/12 − 24π/12 = 13π/12. This is positive and smaller than 24π/12, so it is in the required interval. A is correct. B, 11π/12, is not obtained by subtracting an integer multiple of 2π. C, 7π/12, and D, π/12, likewise have different remainders and are not coterminal with the given angle. Memory cue: reduce an angle by complete turns, not by arbitrary fractions of a turn.

Related tags

Coterminal-AnglesRadiansAngle-ReductionTrigonometric-FunctionsAnglesTrigonometric FunctionsMathematicsClass 12 Mcq

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