c}t -->
<p>to get the final results.  "A" here is
<img src="pix/fmeq23.png" alt="wct">
in the earlier formulas,  and "B" is either
<img src="pix/fmeq41.png" alt="cos sin"> or
<img src="pix/fmeq40.png" alt="sin sin">.
The Fourier transform we want is not obvious to us (not to me, certainly!), so we go to Abramowitz and Stegun, 
"Handbook of Mathematical Functions" and find (formulas 9.1.42 and 9.1.43):
</p>


<!-- LATEX \cos(B\sin\omega_{m}t)=J_{0}(B)+2J_{2}(B)\cos 2\omega_{m}t + \,\cdots\, + 2J_{2n}(B)\cos 