First, what happens if "a"=0 or "b" = 0 ????

One way:

=IF(OR(a=0,b=0),"????",IF(a0,IF(b0,c,180-c),IF(b0,360-c,c+180)))


In article ,
"mark.ew" wrote:

Hi there,
Could anybody please help me with a formula i am trying to enter into my
excel spreadsheet.
i have two sets of variables "a" and "b" which are related to each other.
Using a seperate formula I obtain "c" What i would like to do is apply 1 of
4 equations to "c" depending on the value of "a" and "b".

if "a"0 and "b"0 then "c" stays as it is
"a"<0 and "b"0 then minus"c" from 360
"a"0 and "b"<0 then minus"c" from 180
"a"<0 and "b"<0 then "c" plus 180

Is it at all possible to formulate the above??

Thanks for any help


Mark