Question

The angle of $1^{\prime }$ (minute of arc) in radian is nearly equal to

• A. $2.91\times 10^{-4}$ rad
• B. $4.85\times 10^{-4}$ rad
• C. $4.80\times 10^{-6}$ rad
• D. $1.75\times 10^{-2}$ rad

Answer 1

Answer: (A)

$1={\left(\frac{1}{60}\right)}^{\circ }=\frac{1}{60}\times \frac{\pi }{180}$ radian
$=2.91\times 10^{-4}$ radian