Please describe the problem:
gcalctool shows wrong or unexpected behavior. I know this is a bit vage but the
below I will write down the steps to reproduce the behaviour.

Steps to reproduce:
1. set gcalctool to scientific mode and if neccesary uncheck "use arithmetic
precedence", set gcalctool to use degrees.

2. try to caclulate 2*sin(30) by pressing: '30', then 'sin' and then 'x' 2
3. the answer is 1.047197551 but it should be 1.

what happens is that as soon as you press 'x' for the multiplication, gcalctool
makes a calculation where 0.5 is converted to 0.523598776. 
That just shouldn't happen.

another example which perhaps shows some more light on what's going on is to
calculate 2*arcsin(0.5) by pressing: '0.5' then check 'inv' and then press sin.
(the answer is 30 degrees which is still correct) now multiply by two, so press:
'x' and then gcalctool suddenly shows: "0.5" (which is the first entered value
we started out with). Now press '2' and '=' and the answer gcalctool gives is:
'1'. It should be 60 (degrees).

So aparently something goes wrong when pressing one of the  + - / or * operators
after performing a trigonometric operation.



Actual results:


Expected results:


Does this happen every time?


Other information:
This is a regression from the behaviour of gcalctool 5.6.31 in gnome 2.12.