sin(x – y) sin(x + y) = (sin(x) – sin(y)) (sin(x) + sin(y)) Posted on 2022/01/10 by Carl Robitaille sin(x – y) sin(x + y) = (sin(x) – sin(y)) (sin(x) + sin(y))— Analysis Fact (@AnalysisFact) December 17, 2021