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Documentation / Mathematica / Built-in Functions / Mathematical Functions / Elementary Functions /

Cos

FilledSmallSquare Cos[z] gives the cosine of z.

FilledSmallSquare Mathematical function (see Section A.3.10).

FilledSmallSquare The argument of Cos is assumed to be in radians. (Multiply by Degree to convert from degrees.)

FilledSmallSquare Cos is automatically evaluated when its argument is a simple rational multiple of ; for more complicated rational multiples, FunctionExpand can sometimes be used.

FilledSmallSquare See Section 1.1.3 and Section 3.2.6.

FilledSmallSquare See also: ArcCos, Sec, TrigToExp, TrigExpand.

FilledSmallSquare New in Version 1.

Further Examples