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Trigonometry – II — Maths STD 11 Science — Question

Maharashtra BoardEnglish MediumSTD 11 ScienceMathsTrigonometry – II1 Mark
Question
Express the following as sum or difference of two trigonometric function : $4 \sin \left(\frac{A+B}{2}\right) \sin \left(\frac{A-B}{2}\right)$
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