Express the given product as a sum containing only sines or cosines. sin (7?) cos (3?) sin (7?) cos (3?) = (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the ex
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Step 1: Use the trigonometric identity: sin(A)cos(B) = 1/2[sin(A+B) + sin(A-B)]. Show more…
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