Choose the value of 13°12' from the following—

Explanation

$$13^{\circ}12' = 13^{\circ} \left(\frac{12}{60}\right)^{\circ}$$ $$= 13^{\circ} + \frac{1^{\circ}}{5}$$ $$= \frac{66^{\circ}}{5}$$ ∴ $$180^{\circ} = \pi$$ $$\frac{66^{\circ}}{5} = \frac{66 \times \pi}{5 \times 180^{\circ}}$$ $$= \frac{11}{150}\pi$$