Editing Cabibbo–Kobayashi–Maskawa matrix (section)

===KM parameters===
The original parameterization of Kobayashi and Maskawa used three angles ({{thin space}}{{mvar|θ}}{{sub|1}}, {{mvar|θ}}{{sub|2}}, {{mvar|θ}}{{sub|3}}{{thin space}}) and a CP-violating phase angle ({{thin space}}{{mvar|δ}}{{thin space}}).<ref name="KM"/> {{mvar|θ}}{{sub|1}} is the Cabibbo angle. For brevity, the cosines and sines of the angles {{mvar|θ}}{{sub|k}} are denoted {{mvar|c}}{{sub|k}} and {{mvar|s}}{{sub|k}}, for {{nowrap|k {{=}} 1,{{thin space}}2,{{thin space}}3}} respectively. 
::<math>\begin{bmatrix} c_1 & -s_1 c_3 & -s_1 s_3 \\
 s_1 c_2 & c_1 c_2 c_3 - s_2 s_3 e^{i\delta} &  c_1 c_2 s_3 + s_2 c_3 e^{i\delta}\\
 s_1 s_2 & c_1 s_2 c_3 + c_2 s_3 e^{i\delta} &  c_1 s_2 s_3 - c_2 c_3 e^{i\delta} \end{bmatrix}. </math>