cplxtrig(C++)

cplxtrig -- trigonometric and hyperbolic functions for the C++ complex library

Synopsis

   #include <complex.h>
   class complex {
   
   public:
   	friend complex	sin(complex);
   	friend complex	cos(complex);
   

   	friend complex	sinh(complex);
   	friend complex	cosh(complex);
   };

Description

The following trigonometric functions are defined for complex, where: -- x and y are of type complex.

y = sin(x): Returns the sine of x.
y = cos(x): Returns the cosine of x.
y = sinh(x): Returns the hyperbolic sine of x.
y = cosh(x): Returns the hyperbolic cosine of x.

References

complex(C++), cartpol(C++), complex_error(C++), cplxops(C++), cplxexp(C++).

Diagnostics

If the imaginary part of x would cause overflow sinh and cosh return (0, 0). When the real part is large enough to cause overflow, sinh and cosh return (HUGE, HUGE) if the cosine and sine of the imaginary part of x are non-negative, (HUGE, -HUGE) if the cosine is non-negative and the sine is less than 0, (-HUGE, HUGE) if the sine is non-negative and the cosine is less than 0, and (-HUGE, -HUGE) if both sine and cosine are less than 0. In all these cases, errno is set to ERANGE.

These error-handling procedures may be changed with the function complex_error(C++).