simplifying symbolic expressions with factors of pi

If I have some symbolic expression say

FF = besselj(1/2,x)
FF = (2^(1/2)*sin(x))/(pi^(1/2)*x^(1/2))

I wish to cancel this factor of pi^(1/2) however if I do

GG =  FF*pi^(1/2)

then I will get an expression that still has the factor of 1/pi^(1/2) but also a numeric approximation to pi^(1/2) multiplied by it.

How does matlab hold this "symbolic" pi value, since clearly normal pi is just a dp variable and how do I cancel it in expressions?

Answer 1

[Azzi Abdelmalek]

vpa(FF)

or

 vpa(FF,4)

[David H]

vpa will convert this expression yes but there must be a way to simply cancel this symbolic pi that matlab introduces itself exactly to produce nicer expressions?