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function:ACOS

**This is an old revision of the document!**

The ACOS function returns the arccosine of its argument which must be int he range -1 to 1 inclusive.

If ACOS(x)=y, then COS(y)=x.

function/ACOS.1421301932.txt.gz · Last modified: 2015/01/15 01:05 by peternlewis