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If x° = 11π/36 radians, what is the value of x?

Answer and explanation

Correct answer: 55°

The governing concept is conversion between radians and degrees. The fundamental equivalence is π radians = 180°. Therefore, to convert 11π/36 radians into degrees, multiply by 180°/π: x = (11π/36) × (180°/π). The factor π cancels, leaving x = 11 × 180°/36 = 11 × 5° = 55°. Thus option D is correct. A useful check is that 11π/36 is slightly greater than π/4, and π/4 equals 45°, so a result somewhat greater than 45° is reasonable. The other options do not result from the correct conversion factor; confusing π radians with 90° or simplifying 180/36 incorrectly can lead to them.

Related tags

AnglesRadian-Degree-ConversionTrigonometryTrigonometric FunctionsMathematicsClass 12 Mcq

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