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function template
<complex>

std::acos

template<class T> complex<T> acos (const complex<T>& x);
Arc cosine of complex
Returns the arc cosine of the complex number x.

This is the complex version of the acos function (defined in <cmath>).

Parameters

x
Complex value.

Return value

Arc cosine of x.

See also

asin
Arc sine of complex (function template )
atan
Arc tangent of complex (function template )
acosh
Arc hyperbolic cosine of complex (function template )
acos (cmath)
Compute arc cosine (function )

C++

Reference