tanh
Returns the hyperbolic tangent of a complex number.
template<class Type>
complex<Type> tanh(
const complex<Type>& _ComplexNum
);
Parameters
- _ComplexNum
The complex number whose hyperbolic tangent is being determined.
Return Value
The complex number that is the hyperbolic tangent of the input complex number.
Remarks
Identities defining the complex hyperbolic cotangent:
tanh (z) = sinh (z) / cosh (z) = ( exp (z) – exp (-z) ) / ( exp (z) + exp (-z) )
Example
// complex_tanh.cpp
// compile with: /EHsc
#include <vector>
#include <complex>
#include <iostream>
int main( )
{
using namespace std;
double pi = 3.14159265359;
complex <double> c1 ( 3.0 , 4.0 );
cout << "Complex number c1 = " << c1 << endl;
// Values of cosine of a complex number c1
complex <double> c2 = tanh ( c1 );
cout << "Complex number c2 = tanh ( c1 ) = " << c2 << endl;
double absc2 = abs ( c2 );
double argc2 = arg ( c2 );
cout << "The modulus of c2 is: " << absc2 << endl;
cout << "The argument of c2 is: "<< argc2 << " radians, which is "
<< argc2 * 180 / pi << " degrees." << endl << endl;
// Hyperbolic tangents of the standard angles
// in the first two quadrants of the complex plane
vector <complex <double> > v1;
vector <complex <double> >::iterator Iter1;
complex <double> vc1 ( polar ( 1.0, pi / 6 ) );
v1.push_back( tanh ( vc1 ) );
complex <double> vc2 ( polar ( 1.0, pi / 3 ) );
v1.push_back( tanh ( vc2 ) );
complex <double> vc3 ( polar ( 1.0, pi / 2 ) );
v1.push_back( tanh ( vc3 ) );
complex <double> vc4 ( polar ( 1.0, 2 * pi / 3 ) );
v1.push_back( tanh ( vc4 ) );
complex <double> vc5 ( polar ( 1.0, 5 * pi / 6 ) );
v1.push_back( tanh ( vc5 ) );
complex <double> vc6 ( polar ( 1.0, pi ) );
v1.push_back( tanh ( vc6 ) );
cout << "The complex components tanh (vci), where abs (vci) = 1"
<< "\n& arg (vci) = i * pi / 6 of the vector v1 are:\n" ;
for ( Iter1 = v1.begin( ) ; Iter1 != v1.end( ) ; Iter1++ )
cout << *Iter1 << endl;
}
Complex number c1 = (3,4) Complex number c2 = tanh ( c1 ) = (1.00071,0.00490826) The modulus of c2 is: 1.00072 The argument of c2 is: 0.00490474 radians, which is 0.281021 degrees. The complex components tanh (vci), where abs (vci) = 1 & arg (vci) = i * pi / 6 of the vector v1 are: (0.792403,0.24356) (0.85004,0.713931) (-3.54238e-013,1.55741) (-0.85004,0.713931) (-0.792403,0.24356) (-0.761594,-8.68604e-014)
Requirements
Header: <complex>
Namespace: std