ArcCos• ArcCos[z] gives the arc cosine  of the complex number z. • All results are given in radians.
• ArcCos[z] can be input as  .
• For real z between -1 and 1, the results are always in the range 0 to  .
• See also: ArcSin, ArcTan.
 Examples Using InstantCalculatorsHere is the InstantCalculator for the ArcCos function. Enter the parameters for your calculation and click Calculate to see the result.
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Entering Commands DirectlyYou can paste a template for this command via the Text Input button on the ArcCos Function Controller. Here is a plot of ArcCos[x] for x from -1 to 1.
This is the derivative.
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This is the indefinite integral.
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Ordinary Mathematical NotationThis also gives the derivative.
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This also gives the indefinite integral.
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