std::cos(std::complex) - cppreference.com (original) (raw)
| | | | | ------------------------------------------------------------- | | | | template< class T > complex<T> cos( const complex<T>& z ); | | |
Computes complex cosine of a complex value z.
[edit] Parameters
[edit] Return value
If no errors occur, the complex cosine of z is returned.
Errors and special cases are handled as if the operation is implemented by [std::cosh](cosh.html "cpp/numeric/complex/cosh")(i * z), where i is the imaginary unit.
[edit] Notes
The cosine is an entire function on the complex plane, and has no branch cuts.
Mathematical definition of the cosine is cos z = .
[edit] Example
Output:
cos(1.000000,0.000000) = (0.540302,-0.000000) ( cos(1) = 0.540302) cos(0.000000,1.000000) = (1.543081,-0.000000) (cosh(1) = 1.543081)
[edit] See also
| sin(std::complex) | computes sine of a complex number (\({\small\sin{z}}\)sin(z)) (function template) [edit] |
|---|---|
| tan(std::complex) | computes tangent of a complex number (\({\small\tan{z}}\)tan(z)) (function template) [edit] |
| acos(std::complex)(C++11) | computes arc cosine of a complex number (\({\small\arccos{z}}\)arccos(z)) (function template) [edit] |
| coscosfcosl(C++11)(C++11) | computes cosine (\({\small\cos{x}}\)cos(x)) (function) [edit] |
| cos(std::valarray) | applies the function std::cos to each element of valarray (function template) [edit] |
| C documentation for ccos |