SIN(3) Library Functions Manual SIN(3)

sin — sine function

#include <math.h>

double sin(double x);

The sin() function computes the sine of its argument x , measured in radians.

An application wishing to check for error situations should set errno to 0 before calling sin(). If errno is non-zero on return, or the return value is NaN, an error has occurred.

The sin() function may lose accuracy when its argument is far from 0.0 .

Upon successful completion, sin() returns the sine of x .

If x is NaN, NaN is returned and errno may be set to [EDOM].

If x is ±Inf, either 0.0 is returned and errno is set to [EDOM], or NaN is returned and errno may be set to [EDOM].

If the correct result would cause underflow, 0.0 is returned and errno may be set to [ERANGE].

The sin() function may fail if:

The value of x is NaN, or x is ±Inf.
The result underflows.

No other errors will occur.

None.

None.

None.

asin(3) , isnan(3) , <math.h> .

Derived from Issue 1 of the SVID.

February 1997 posix.fail