diff --git a/math.tex b/math.tex
index c4b919f..d06146b 100644
--- a/math.tex
+++ b/math.tex
@@ -10,6 +10,8 @@
 \newcommand{\einsmatrix}{\mathbbm{1}}
 \newcommand{\bigO}{\mathbbm{O}}
 \newcommand{\inlinematrix}[1]{\begin{pmatrix} #1 \end{pmatrix}}
+\newcommand{\inlinearray}[2]{\left( \begin{array}{#1} #2 \end{array} \right)}
+
 \newcommand{\inlinematrixu}[1]{\begin{matrix} #1 \end{matrix}}
 \newcommand{\inlinematrixd}[2]{\left( \begin{matrix} #1\vphantom{#2} \end{matrix} ~\right| \left. \begin{matrix} \vphantom{#1}#2 \end{matrix} \right)}
 \newcommand{\inlinematrixdet}[1]{\begin{vmatrix} #1 \end{vmatrix}}
@@ -46,6 +48,8 @@
 \newcommand{\sinb}[1]{\sin\sbk{#1}}
 \newcommand{\sinhb}[1]{\sinh\sbk{#1}}
 \newcommand{\coshb}[1]{\cosh\sbk{#1}}
+\newcommand{\cotb}[1]{\cot\sbk{#1}}
+\newcommand{\tanb}[1]{\tan\sbk{#1}}
 \newcommand{\arcsinb}[1]{\arcsin\sbk{#1}}
 \newcommand{\airyb}[1]{\text{Ai}\sbk{#1}}
 \newcommand{\lnb}[1]{\text{ln}\sbk{#1}}