allery$\dfrac{\pi}{6}$ radian = ?
A$15^{\circ}$
B$30^{\circ}$
C$45^{\circ}$
D$60^{\circ}$
Answer & Solution
Correct answer: B. $30^{\circ}$
$\dfrac{180}{\pi} \cdot \dfrac{\pi}{6} = 30^{\circ}$.
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