If 2 sin 50⁰ cos 70° = sin Asin B, then A=?, B = ?
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1
Answer:
sinA- sin B=2cos
2
A+B
sin
2
A−B
sin50
∘
−sin70
∘
=2cos
2
50
∘
+70
∘
sin
2
50
∘
−70
∘
=−sin10
∘
∴−sin10
∘
+sin10
∘
=0
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