Display 0.25 not .25

Hello I have the following small piece of code.

XMLTools[Print](MathML[Export]('sin(theta)'=0.25));

which exports sin(theta)=.25, how do I force the 0 to display.

Also

why does the following fail:

sol:=solve([cot(x)=2,x>=0,x<2*Pi],x,AllSolutions, Explicit);