Subjective Type

Convert the following angles in radians: $$120^{\circ} $$

Solution

$$ \because $$ $$180^{\circ} = \pi $$ radian $$ \therefore $$ $$1^{\circ} = \dfrac{\pi}{180} $$ radians $$120^{\circ} = \dfrac{\pi}{180} \times 120 $$ radians $$ = \dfrac{2 \pi}{3} $$ radian

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