In Excel, the ACos function returns the arccosine (in radians) of a number.
The syntax for the ACos function is:
ACos( number )
number is a number between -1 and 1. It is the cosine of the angle that you wish to find.
Applies To:
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Trigonometry functions are used to work out the various properties of triangles.
'How do you do formulas on excel and continue to work with answer as a numerical value and not a formula '
The law of sines: http://www.ies.co.jp/math/java/trig/seigen/seigen.html
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