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# std::atan(std::complex)

From cppreference.com
< cpp‎ | numeric‎ | complex

Defined in header `<complex>` |  |
template< class T > complex<T> atan( const complex<T>& z ); |  | (since C++11)

Computes complex arc tangent of a complex value `z`. Branch cut exists outside the interval [−i ; +i] along the imaginary axis.

### [edit] Parameters

z | - | complex value

### [edit] Return value

Complex arc tangent of `z` in the range [−iπ/2 ; +iπ/2] along the imaginary axis.

### [edit] See also

asin(std::complex) (C++11) | computes arc sine of a complex number (arcsin(z)) (function template) [edit]
acos(std::complex) (C++11) | computes arc cosine of a complex number (arccos(z)) (function template) [edit]
tan(std::complex) | computes tangent of a complex number (tan(z)) (function template) [edit]
atan | computes arc tangent (arctan(x)) (function) [edit]
atan(std::valarray) | applies the function std::atan to each element of valarray (function template) [edit]
C documentation for catan

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