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Which angle is a negative coterminal angle of 65°?

Answer and explanation

Correct answer: -295°

The governing concept is coterminal angles. Two angles are coterminal when they differ by an integer multiple of 360°, because they have the same terminal side after complete rotations. To obtain a negative coterminal angle from 65°, subtract 360° once: 65° - 360° = -295°. Therefore option B is correct. Verification is immediate because -295° + 360° = 65°. Although -245°, -305°, and -325° are all negative angles, adding 360° gives 115°, 55°, and 35° respectively, not 65°. Thus they do not share the same terminal side. The essential operation is subtraction of 360°, not merely choosing any negative angle.

Related tags

TrigonometryAnglesCoterminal-AnglesClass-12Trigonometric FunctionsMathematicsClass 12 Mcq

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