If A + B + C = <span class="math-tex">\(\pi \)</span>, then, the value of <span class="math-tex">\(\left| {\begin{array}{*{20}{c}} {\sin \left( {A + B + C} \right)}&{\sin B}&{\cos C}\\ { - \sin B}&0&{\tan A}\\ {\cos \left( {A + B} \right)}&{ - \tan A}&0 \end{array}} \right|\)</span> is
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