Question: Error in shadebetween

Can anyone offer an explanation why the following error occurs, and how it can be avoided? Thanks!

 

plots:-shadebetween(2, 1/sqrt(-x^2+1), x = 0 .. (1/2)*sqrt(3))

Error, (in t) invalid input: nops expects 1 argument, but received 0

 

``

 

Download error.mw

Please Wait...