Question

Radian measure of $25^{\circ }$ is

• A. ${\left(\frac{3\pi }{36}\right)}^c$
• B. ${\left(\frac{5\pi }{36}\right)}^c$
• C. ${\left(\frac{8\pi }{35}\right)}^c$
• D. None of these

Answer 1

Answer: (B)

$\because 180^{\circ }={\pi }^c\Rightarrow 1^{\circ }={\left(\frac{\pi }{180}\right)}^c$
$\Rightarrow 25^{\circ }={\left(\frac{\pi }{180}\times 25\right)}^c={\left(\frac{5\pi }{36}\right)}^c$