sqrt

sinh

#include <math.h>float sinhf(float arg);double sinh(double arg); long double sinhl(long double arg); 

sinhf( ) and sinhl( ) were added by C99.

The sinh( ) family of functions returns the hyperbolic sine of arg.

Related functions are asin( ), acos( ), atan2( ), atan( ), tan( ), cos( ), tanh( ), cosh( ), and sin( ).