Question: In Problems 4974, establish each identity. sin (a + 3) + sin(a - 3) = 2 sin a cos 3

In Problems 49–74, establish each identity.

sin (a + 3) + sin(a - 3) = 2 sin a cos 3

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To establish the identity sinalpha beta sinalpha beta 2sinalpha cosbeta well use the sumtoproduct trigonometric identity for sine sinA B sinA B 2 sinA ... View full answer

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