how do you convert 3x10^-3 rad to 10 min of arce

Answer 1

π radians = 180° = 180*60 minutes of arc = 1080 minutes of arc

So every minute of arc equals
π/1080
= 0.000290888208666 radians approximately

10 minutes of arc
= 0.00290888208666 radians approx.
= 3*10^-3 approx.

To do the inverse conversion, divide the number of radians by 0.00029...