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Convert sin7a + sin5a as a product . Solve it .. thanks a lot
Dear studentsin 7α + sin 5α= 2 sin (7α + 5α)/2 cos (7α - 5α)/2, [Since, sin α + sin β = 2 sin (α + β)/2 cos (α - β)/2]= 2 sin 6α cos αHope this helps Good luck
FORMULA:sin A + sin B= 2.sin(A+B)/2.sin(A-B)/2 Now put the values according to the question you will get it
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