##### Synopsis

    #include <math.h>
    float sinf(float x);

##### Description

sinf returns the radian circular sine of x.

##### Fast math library special cases

If |x| > 10^9, errno is set to EDOM and sin returns HUGE_VALF.

##### IEC 60559 math library special cases

sinf returns x if x is NaN.
sinf returns NaN with invalid signal if |x| is ?.

##### Portability

sinf conforms to ISO/IEC 9899:1990 (C90) and ISO/IEC 9899:1999 (C99).