Help with a calculation

I'm trying to put this calculation in Construct from a spreadsheet.

(D6/COS(PI()/C3)-D6)

It is set up similar in Construct 2 with D6 & C3 being variables.

The answer to the equation I'm testing with is:

(600/COS(PI()/4)-600)= <font color=blue>248.53</font>

Can anyone help get the same result in Construct I think it's the fact that the spreadsheet is in "radians" and Construct is in "degrees".

Any help would be fantastic since I'm a bit mathematically challenged. Also the calculation must also work if D6=600 & C3=4 change.

Thanks.

As usual after struggling for an hour or so then asking for help I sort it out.

If I replace PI with 180 my answer matches my spreadsheet.