If \( \mathrm{A}=30^{\circ} \) and \( \mathrm{B}=60^{\circ} \), ver...

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If \( \mathrm{A}=30^{\circ} \) and \( \mathrm{B}=60^{\circ} \), verify that :
\[
\sin (A+B)=\sin A \cos B+\cos A \sin B .
\]
P
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