Elimits,

You convert to degrees AFTER you do the ASIN, since ASIN only take values
from -1 to 1:

=ASIN(-0.5)*180/PI()

or, if the value is in cell A1
=ASIN(A1)*180/PI()

HTH,
Bernie
MS Excel MVP

"Elimits" wrote in message
...
I need to inv sine a value in a spreadsheet, I have already converted deg
to
rads. I have tried "Asin" but this does not work