Definition:Inverse Hyperbolic Cosine/Complex

Also see

 * Equivalence of Definitions of Inverse Hyperbolic Cosine


 * Definition:Complex Inverse Hyperbolic Sine
 * Definition:Complex Inverse Hyperbolic Tangent
 * Definition:Complex Inverse Hyperbolic Cotangent
 * Definition:Complex Inverse Hyperbolic Secant
 * Definition:Complex Inverse Hyperbolic Cosecant