Derive the relations between radian, degree and minute.

Explanation

`1^(@)=(pi)/(180)" rad"=1.745 xx10^(2)" rad"`
`therefore 1'=(1^(@))/(60)=(1.745xx10^(-2))/(60)`
`=2.908xx10^(-4)" rad"`
`2.91xx10^(-4)" rad"`
`therefore 1''=(1^(@))/(3600)=(1.745xx10^(-2))/(3600)`
`=4.847xx10^(-6)" rad"`
`=4.85xx10^(-6)" rad"`