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Which of the following is a positive coterminal angle of \(30^\circ\)?

Answer and explanation

Correct answer: \(390^\circ\)

Coterminal angles have the same initial and terminal sides, and their difference is an integral multiple of \(360^\circ\). Since \(30^\circ+360^\circ=390^\circ\), A is correct. The difference for \(330^\circ\) is \(300^\circ\), not \(360^\circ\). Exam tip: use \(\theta\pm360^\circ\).

Related tags

Trigonometric FunctionsAnglesCoterminal AnglesDegree MeasureClass 11 MathematicsMathematicsClass 12 Mcq

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