The angle of 1 (minute of arc) in radian is nearly

\((a)\) \(2.91 \times 10^{-4} ~rad\)

\((b)\) \(4.85 \times 10^{-4}~rad\)

\((c)\) \(4.80 \times 10^{-6}~rad\)

\((d)\) \(1.75 \times 10^{-2}~rad\)

Ans. \((a)\)

Explanation:-

\(1\) \(minute =\) \(\frac{1}{60}\) \(degree\)

= \(\frac{1}{60}\) \(\times\) \(\frac{\pi}{180}~rad\)

= \(2.19\times10^{-4}~rad\)