Piecewise function radians and numbers ?

[fran1942]

Hello, I have encountered the following piecewise function:

(x − 1)^2 if x > 1
tan x if −π/2 < x ≤ 0

How would I interpret/graph this, as it seems to be referring to radians and regular numbers ?
Thanks for any help.

 

[Vorde]

Radians are a way to name angles. With radians, you would say pi/2 radians. pi/2 is just a number, equal to approx 1.57

 

[HallsofIvy]

Your function, by the way, is not defined for $0< x\le 1$.