Piecewise function radians and numbers ?

fran1942
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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.
 
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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
 
Your function, by the way, is not defined for 0&lt; x\le 1.
 

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