Use the trigonometric identity sin mx cos nx = 1 2 sin(m n)x + sin(m + n)x to prove Eq
Chapter 7, Problem 78(choose chapter or problem)
Use the trigonometric identity sin mx cos nx = 1 2 sin(m n)x + sin(m + n)x to prove Eq. (18) in the table of integrals on page 383.
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