cos, cosl
Remonter à Math.h - Index
Header File
math.h
Category
Math Routines, Inline Routines
Prototype
double cos(double x);
long double cosl(long double x);
Description
Calculates the cosine of a value.
cos computes the cosine of the input value. The angle is specified in radians.
cosl is the long double version; it takes a long double argument and returns a long double result.
Return Value
cos of a real argument returns a value in the range -1 to 1. Error handling for these functions can be modified through _matherr (or _matherrl).
Example
#include <stdio.h>
#include <math.h>
int main(void)
{
double result;
double x = 0.5;
result = cos(x);
printf("The cosine of %lf is %lf\n", x, result);
return 0;
}
Portability
POSIX | Win32 | ANSI C | ANSI C++ | |
---|---|---|---|---|
cos |
+ |
+ |
+ |
+ |
cosl |
+ |
+ |
+ |