deletions | additions       diff --git a/begin_eqnarray_c_v_frac_1__.tex b/begin_eqnarray_c_v_frac_1__.tex  index a4df05d..8383fbf 100644  --- a/begin_eqnarray_c_v_frac_1__.tex  +++ b/begin_eqnarray_c_v_frac_1__.tex 
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\begin{eqnarray}  c_v & = & \frac{1}{L}\frac{d\theta}{dB} \\  method 1 & 1&  = & \frac{1}{L}\frac{\Delta \theta}{\Delta B} \\ method 2 & 2&  = & \frac{1}{L}\left(\frac{d\theta}{dV_{pd}}\right)_{at ?}\frac{dV_{pd}}{dB}\\ method 3 & 3&  = & \frac{1}{L}\left(\frac{d\theta}{dV_{pd}}\right)_{at ?} \frac{V_{pd, RMS}}{B_{RMS}} \end{eqnarray}