- Choice F
$360°=2\pi\ radians$
$\frac{2\pi}{360°}=\frac{x}{30°}$
$=> x=30\times\frac{2\pi}{360°}=\frac{\pi}{6}$
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$360°=2\pi\ radians$
$\frac{2\pi}{360°}=\frac{x}{30°}$
$=> x=30\times\frac{2\pi}{360°}=\frac{\pi}{6}$
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