Question

$1$ radian equals to?

Answer 1

Solution.

We know that

$$\begin{gathered} 1\mathrm{radian}=\frac{180°}{\mathrm{\pi }} \\ =\frac{180°}{{\displaystyle \frac{22}{7}}} \\ =\frac{180°\times 7}{{\displaystyle 22}} \\ =57.2958° \end{gathered}$$

Hence, $1$ radian equals to $57.2958°$.