
<!-- LATEX \[  \cos (B \sin \omega_{m}t) \textrm{ and } \sin (B\sin \omega_{m}t)  \]: fmeq7 -->
<!-- LATEX \sin (B\sin \omega_{m}t): fmeq40 -->
<!-- LATEX \cos (B \sin \omega_{m}t): fmeq41 -->

<!-- <img src="pix/fmeq7.png" alt="cos and sin"> -->


<!-- LATEX 
\Large
\begin{eqnarray*}
\cos a \, \cos b = \frac{1}{2}(\cos (a-b) + \cos(a+b)) \\
\sin a \, \sin b = \frac{1}{2}(\cos (a-b) - \cos(a+b)) \\
\end{eqnarray*}
-->

<img class="indented" src="pix/fmeq8.png" alt="coscos and sinsin">


<!-- LATEX \omega_{