I was computing an integral (Running Maple 18 on Windows 10):
The classic lenght of arc Integral of sqrt(1+(dy/dx)^2) dx
In this case, the function was a cartesian circle (x-R)^2+y^2=R^2 isolated as y=sqrt(R^2-(x-R)^2)
When I do the integration, the result of the integral is not correct.
But if I change R for a, the result is correct. Why? This does not make any sense.
R wasn't assigned to any variable. The code was:
In fact, any UPPERCASE letter used as the radius gives me the wrong answer whereas any LOWERCASE letter gives me the proper result. Why is this?
Thanks and have a nice day
EDIT: I added a Screenshot