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If (\frac{3\pi}{5}) radians is converted into degrees, what is the angle?

Answer and explanation

Correct answer: (108^\circ)

The direct answer is option B: 108°. The conversion rule is that a full turn is both 360° and 2π radians, so 1 radian equals 180° divided by π. Therefore, for the given angle, \\(\frac{3\pi}{5}\times\frac{180^\circ}{\pi}=\frac{3\times180^\circ}{5}=108^\circ\\). The π cancels first, then multiplication and division are easy. Option A, 96°, is wrong because it does not result from the conversion calculation. Option B, 108°, is correct because it follows directly from the standard radian-to-degree factor. Option C, 120°, would correspond to a different radian value, namely about \(\frac{2\pi}{3}\), not \(\frac{3\pi}{5}\). Option D, 135°, is also too large and would correspond to \(\frac{3\pi}{4}\). The safest exam method is to multiply radians by \(\frac{180^\circ}{\pi}\), cancel π, and simplify. Never multiply by 180° without dividing by π.

Related tags

Trigonometry Angles Conversion Hard Class11AnglesTrigonometric FunctionsMathematicsClass 12 Mcq

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