# Making parts of equations larger

Is there a way to make only a part of an equation larger? I'm working with the code below, but I feel like the s-angle-n and a-angle-n are far too small and would really like to make them both bigger without affecting the rest of the equation.

\DeclareRobustCommand{\lcroof}[1]{
\hbox{\vtop{\vbox{%
\hrule\kern 1pt\hbox{%
$\scriptstyle #1$%
\kern 1pt}}\kern1pt}%
\vrule\kern1pt}}
\DeclareRobustCommand{\angle}[1]{
_{\lcroof{#1}}}

\begin{align*}
s\angle{n}&=\dfrac{(1+r)^n-1}{r}\\
a\angle{n}&=\dfrac{1-\dfrac{1}{(1+r)^n}}{r}
\end{align*}


Thanks for any help.

• How much bigger would be better than "far too small"?
– Werner
Commented Oct 2, 2013 at 20:47
• They seem to have the proper size. Commented Oct 2, 2013 at 21:55

How about put them in text mode and then use \Huge, \Large, etc.

\begin{align*}
\mbox{\Huge{$s\angle{n}$}}  &=  \dfrac{(1+r)^n -1}{r}  \\
\mbox{\Huge{$a\angle{n}$}}  &=  \dfrac{1 - \dfrac{1}{(1+r)^n}}{r}
\end{align*}


Probably not the nicest solution, but you could use: \usepackage{graphicx}, and then have:

\begin{align*}
\scalebox{1.5}{$s\angle{n}$}  &=  \dfrac{(1+r)^n -1}{r}  \\
\scalebox{1.5}{$a\angle{n}$}  &=  \dfrac{1 - \dfrac{1}{(1+r)^n}}{r}
\end{align*}


Where you can change the 1.5 to suit your taste.