Question 95

sin(A+B) - sin(A-B) is equal to

Solution

Expression : sin(A+B) - sin(A-B)

= $$(sin Acos B + cos Asin B) - (sin Acos B - cos Asin B)$$

= $$cos Asin B + cos Asin B = 2cos Asin B$$

=> Ans - (C)

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