MATLAB Function Reference |
Cosine of an argument in radians
Syntax
Description
The cos
function operates element-wise on arrays. The function's domains and ranges include complex values. All angles are in radians.
Y = cos(X)
returns the circular cosine for each element of X
.
Examples
Graph the cosine function over the domain .
The expression cos(pi/2)
is not exactly zero but a value the size of the floating-point accuracy, eps
, because pi
is only a floating-point approximation to the exact value of .
Definition
Algorithm
cos
uses FDLIBM, which was developed at SunSoft, a Sun Microsystems, Inc. business, by Kwok C. Ng, and others. For information about FDLIBM, see http://www.netlib.org.
See Also
corrcoef | cosd |
© 1994-2005 The MathWorks, Inc.