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What do we get when 210° is converted into radians?

Answer and explanation

Correct answer: 7π/6 radians

The governing conversion factor is π/180 radians per degree. Therefore, 210° = 210 × π/180 radians. Simplify the numerical fraction by dividing 210 and 180 by 30: 210/180 = 7/6. Thus the answer is 7π/6 radians, so option C is correct. The distractors represent nearby but different standard angles: 5π/6 radians equals 150°, 3π/2 radians equals 270°, and 4π/3 radians equals 240°. Another reasonableness check is useful: 210° is greater than 180° but less than 240°, so its radian measure must be greater than π but less than 4π/3. The value 7π/6 lies in precisely that interval, confirming the calculation and the selected option.

Related tags

Trigonometric-FunctionsAnglesConversionClass-12Trigonometric FunctionsMathematicsClass 12 Mcq

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