Calculate the angular of (a) `1^(@)` (degree) (b) 1' (minute of arc or arcmin) and (c) 1'' (second of arc or arc second) in radians. Use `360^(@)=2pi` rad, `1^(@)=60'` and `1'=60''`

Explanation

(a) We have `360^@ = 2 pi rad`
`1^2 = (pi//180) rad = 1.745 xx 10^(-2) rad `
(b) `1^@ = 60. = 1.745 xx 10^(-2) rad `
`1. = 2.908 xx 10^(-4) rad = 2.91 xx 10^(-4) rad`
(c) `1. = 60.. = 2.908 xx 10^(-4) ` rad
`1.. = 4.847 xx 10^(-6) rad = 4.85 xx 10^(-6) rad`.