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Synopsis:
    #include <math.h>
    double cos( double x );

Description:
    The cos function computes the cosine of x (measured in radians).  A
    large magnitude argument may yield a result with little or no
    significance.

Returns:
    The cos function returns the cosine value.

Example:
    #include <math.h>

    void main()
      {
        double value;
        value = cos( 3.1415278 );
      }

Classification:
    ANSI

Systems:
    Math

See Also:
    acos, sin, tan