- NAME
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cos - cosine function.
- SYNOPSIS
#include <math.h>
double cos(double x);- DESCRIPTION
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The cos() function returns the cosine of x, where x is given in radians.
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Warning
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You’ll also need to link the program against the math library (see example below) using the -lm compile/link option.
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- RETURN VALUE
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The cos() function returns a value between [-1, 1].
- SEE ALSO
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sin, tan
- EXAMPLE
link:src/cos.c[role=include]- OUTPUT
$ gcc -Wall -lm cos.c $ ./a.out cos(0.000000) = 1.000000 cos(1.000000) = 0.540302 cos(2.000000) = -0.416147 cos(3.000000) = -0.989992 cos(4.000000) = -0.653644 cos(5.000000) = 0.283662 cos(6.000000) = 0.960170