std::acos(std::complex)

From Cppreference

C++ Standard Library
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Numerics library
Common mathematical functions Floating-point environment Complex numbers Numeric arrays Pseudo-random number generation Compile-time rational arithmetic (C++11) Generic numeric operations iota (C++11) accumulate inner_product adjacent_difference partial_sum
Complex numbers
Member functions complex::complex complex::operator= complex::real complex::imag complex::operator+= complex::operator-= complex::operator*= complex::operator/= Non-member functions operator== operator!= operator<< operator>> real imag abs arg norm conj proj (C++11) polar Exponential functions exp log log10 Power functions pow sqrt Trigonometric functions sin cos tan asin (C++11) acos (C++11) atan (C++11) Hyperbolic functions sinh cosh tanh asinh (C++11) acosh (C++11) atanh (C++11)

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

Computes complex arc cosine of a complex value z. Branch cut exists outside the interval [−1 ; +1] along the real axis.

[edit] Parameters

z

-

complex value

[edit] Return value

Complex arc cosine of z in the range [0 ; ∞) along the real axis and in the range [−iπ ; iπ] along the imaginary axis.

[edit] See also

asin(std::complex) (C++11)	computes arc sine of a complex number (arcsin(z)) (function template)
atan(std::complex) (C++11)	computes arc tangent of a complex number (arctan(z)) (function template)