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sin C+ sin D এর মান কত ?

2 \sin \frac{C + D}{2} \sin \frac{C - D}{2}

2 \sin \frac{C + D}{2} \cos \frac{C - D}{2}

2 \cos \frac{C + D}{2} \sin \frac{C - D}{2}

2 \sin \frac{C + D}{2} \sin \frac{D - C}{2}

ANS : 2

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