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COS(3) BSD Library Functions Manual COS(3) NAME cos -- cosine function SYNOPSIS #include <math.h> double cos(double x); long double cosl(long double x); float cosf(float x); DESCRIPTION The cos() function computes the cosine of x (measured in radians). SPECIAL VALUES cos(+-0) returns 1. cos(+-infinity) returns a NaN and raises the "invalid" floating-point exception. SEE ALSO sin(3), tan(3), asin(3), acos(3), atan(3), atan2(3), sinh(3), cosh(3), tanh(3), math(3) STANDARDS The cos() function conforms to ISO/IEC 9899:1999(E). BSD November 20, 2002 BSD |