Inverse cosine: Representations through equivalent functions (subsection 27/02/08/12)

ArcCos

$Mathematica Notation$

Involving cos^-1((1+c z)^1/2/2^1/2)

Involving cos^-1(1+z/2^1/2) and cosh^-1(z)

Involving cos^-1(1-z/2^1/2) and cosh^-1(z)