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# How do I find the inverse cosine ???

Hello How do I find the inverse cosine ??? thx for help :)

**Answer** by Lttldude
·
Apr 15, 2012 at 07:40 PM

you mean like the arc cosine? http://unity3d.com/support/documentation/ScriptReference/Mathf.Acos.html

thx for help ....... but I mean when you press in the calculator = SHIFT and then Cos that mean inverse cosine

thx anyway

@firasdeep: The arc cosine function IS the inverse function of the cosine.

Note that like in most programming environments the trigonometric functions work with angles in radians, not degree. Multiply the result with Mathf.Rad2Deg to get the angle in degree.

Gah - I always get confused between the arc, hyperbolic, and inverse trig functions and which are equivalent and which are different. Arcs and Inverses are the same - Hyperbolics are something else.

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