The solution for proving the identity is as follows:
sin(2A) = sin(A + A) As sin(a + b) = sinacosb + sinbcosa, <span>sin(A + A) = sinAcosA + sinAcosA </span> <span>Therefore, sin(2A) = 2sinAcosA
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At Store A is the cost of apples the least. This is because it always has the lowest price for each pound compared to the other lines. Hope this helps!
