diff --git a/doc/src/Eqs/angle_cosine_shift.jpg b/doc/src/Eqs/angle_cosine_shift.jpg
deleted file mode 100644
index d9929939c8..0000000000
Binary files a/doc/src/Eqs/angle_cosine_shift.jpg and /dev/null differ
diff --git a/doc/src/Eqs/angle_cosine_shift.tex b/doc/src/Eqs/angle_cosine_shift.tex
deleted file mode 100644
index e795d6beff..0000000000
--- a/doc/src/Eqs/angle_cosine_shift.tex
+++ /dev/null
@@ -1,9 +0,0 @@
-\documentstyle[12pt]{article}
-
-\begin{document}
-
-$$
-E=-\frac{Umin}{2} \left[ 1+Cos(\theta-\theta_0) \right]
-$$
-
-\end{document}
diff --git a/doc/src/angle_cosine_shift.rst b/doc/src/angle_cosine_shift.rst
index 7bceb571b4..bd7b6416c7 100644
--- a/doc/src/angle_cosine_shift.rst
+++ b/doc/src/angle_cosine_shift.rst
@@ -1,16 +1,16 @@
-.. index:: angle\_style cosine/shift
+.. index:: angle_style cosine/shift
 
-angle\_style cosine/shift command
+angle_style cosine/shift command
 =================================
 
-angle\_style cosine/shift/omp command
-=====================================
+angle_style cosine/shift/omp command
+====================================
 
 Syntax
 """"""
 
 
-.. parsed-literal::
+.. code-block:: LAMMPS
 
    angle_style cosine/shift
 
@@ -18,30 +18,33 @@ Examples
 """"""""
 
 
-.. parsed-literal::
+.. code-block:: LAMMPS
 
    angle_style cosine/shift
-   angle_coeff \* 10.0 45.0
+   angle_coeff * 10.0 45.0
 
 Description
 """""""""""
 
 The *cosine/shift* angle style uses the potential
 
-.. image:: Eqs/angle_cosine_shift.jpg
-   :align: center
+.. math::
 
-where theta0 is the equilibrium angle. The potential is bounded
-between -Umin and zero. In the neighborhood of the minimum E=- Umin +
-Umin/4(theta-theta0)\^2 hence the spring constant is umin/2.
+   E = -\frac{U_{\text{min}}}{2} \left[ 1 + \cos(\theta-\theta_0) \right]
+
+
+where :math:`\theta_0` is the equilibrium angle. The potential is bounded
+between :math:`-U_{\text{min}}` and zero. In the neighborhood of the minimum
+:math:`E = - U_{\text{min}} + U_{\text{min}}/4(\theta - \theta_0)^2` hence
+the spring constant is :math:`\frac{U_{\text{min}}}{2}`.
 
 The following coefficients must be defined for each angle type via the
 :doc:`angle\_coeff <angle_coeff>` command as in the example above, or in
 the data file or restart files read by the :doc:`read\_data <read_data>`
 or :doc:`read\_restart <read_restart>` commands:
 
-* umin (energy)
-* theta (angle)
+* :math:`U_{\text{min}}` (energy)
+* :math:`\theta` (angle)
 
 
 ----------
@@ -83,8 +86,3 @@ Related commands
 :doc:`angle\_cosine\_shift\_exp <angle_cosine_shift_exp>`
 
 **Default:** none
-
-
-.. _lws: http://lammps.sandia.gov
-.. _ld: Manual.html
-.. _lc: Commands_all.html
diff --git a/doc/txt/angle_cosine_shift.txt b/doc/txt/angle_cosine_shift.txt
deleted file mode 100644
index 65dc0924e5..0000000000
--- a/doc/txt/angle_cosine_shift.txt
+++ /dev/null
@@ -1,73 +0,0 @@
-"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
-
-:link(lws,http://lammps.sandia.gov)
-:link(ld,Manual.html)
-:link(lc,Commands_all.html)
-
-:line
-
-angle_style cosine/shift command :h3
-angle_style cosine/shift/omp command :h3
-
-[Syntax:]
-
-angle_style cosine/shift :pre
-
-[Examples:]
-
-angle_style cosine/shift
-angle_coeff * 10.0 45.0 :pre
-
-[Description:]
-
-The {cosine/shift} angle style uses the potential
-
-:c,image(Eqs/angle_cosine_shift.jpg)
-
-where theta0 is the equilibrium angle. The potential is bounded
-between -Umin and zero. In the neighborhood of the minimum E=- Umin +
-Umin/4(theta-theta0)^2 hence the spring constant is umin/2.
-
-The following coefficients must be defined for each angle type via the
-"angle_coeff"_angle_coeff.html command as in the example above, or in
-the data file or restart files read by the "read_data"_read_data.html
-or "read_restart"_read_restart.html commands:
-
-umin (energy)
-theta (angle) :ul
-
-:line
-
-Styles with a {gpu}, {intel}, {kk}, {omp}, or {opt} suffix are
-functionally the same as the corresponding style without the suffix.
-They have been optimized to run faster, depending on your available
-hardware, as discussed on the "Speed packages"_Speed_packages.html doc
-page.  The accelerated styles take the same arguments and should
-produce the same results, except for round-off and precision issues.
-
-These accelerated styles are part of the GPU, USER-INTEL, KOKKOS,
-USER-OMP and OPT packages, respectively.  They are only enabled if
-LAMMPS was built with those packages.  See the "Build
-package"_Build_package.html doc page for more info.
-
-You can specify the accelerated styles explicitly in your input script
-by including their suffix, or you can use the "-suffix command-line
-switch"_Run_options.html when you invoke LAMMPS, or you can use the
-"suffix"_suffix.html command in your input script.
-
-See the "Speed packages"_Speed_packages.html doc page for more
-instructions on how to use the accelerated styles effectively.
-
-:line
-
-[Restrictions:]
-
-This angle style can only be used if LAMMPS was built with the
-USER-MISC package.
-
-[Related commands:]
-
-"angle_coeff"_angle_coeff.html,
-"angle_cosine_shift_exp"_angle_cosine_shift_exp.html
-
-[Default:] none