You can use the ATAN function. Note that all trig functions in Excel work
with Radians, not Degrees. Thus, you may need to use the RADIANS function to
convert degrees to radians or DEGREES to convert radians to degrees. E.g.,

=DEGREES(ATAN(A1))

returns the number of degrees of the angle whose tangent is in cell A1.


--
Cordially,
Chip Pearson
Microsoft Most Valuable Professional
Excel Product Group
Pearson Software Consulting, LLC
www.cpearson.com
(email on web site)




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