std:: sin (std::complex)

Computes complex sine of a complex value z .

Parameters

Return value

If no errors occur, the complex sine of z is returned.

Errors and special cases are handled as if the operation is implemented by - i * std::sinh ( i * z ) , where i is the imaginary unit.

Notes

The sine is an entire function on the complex plane, and has no branch cuts.

Example

#include <cmath>
#include <complex>
#include <iostream>
int main()
{
    std::cout << std::fixed;
    std::complex<double> z(1.0, 0.0); // behaves like real sine along the real line
    std::cout << "sin" << z << " = " << std::sin(z)
              << " ( sin(1) = " << std::sin(1) << ")\n";
    std::complex<double> z2(0.0, 1.0); // behaves like sinh along the imaginary line
    std::cout << "sin" << z2 << " = " << std::sin(z2)
              << " (sinh(1) = " << std::sinh(1) << ")\n";
}

sin(1.000000,0.000000) = (0.841471,0.000000) ( sin(1) = 0.841471)
sin(0.000000,1.000000) = (0.000000,1.175201) (sinh(1) = 1.175201)

See also