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Calculate the sine of an angle
#include <math.h>
double sin( double x );
float sinf( float x );
- x
- The angle, in radians, for which you want to compute the sine.
libm
Use the -l m option to
qcc
to link against this library.
The sin() and sinf() functions compute the sine (specified in radians) of x. An argument with a large magnitude may yield a result
with little or no significance.
The sine value.
|
If an error occurs, these functions return 0, but this is also a valid
mathematical result.
If you want to check for errors, set
errno
to 0, call the function, and then check errno again.
These functions don't change errno if no errors occurred. |
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
int main( void )
{
printf( "%f\n", sin(.5) );
return( EXIT_SUCCESS );
}
produces the output:
0.479426
ANSI,
POSIX 1003.1
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
No |
Thread |
Yes |
acos(),
asin(),
atan(),
atan2(),
cos(),
tan()
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