Trigonometry Identities: sin(x +/- y) = sin(x)cos(y) +/- cos(x)sin(y)

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mes4.3 K2 years agoPeakD2 min read

In this video I use the cos(x - y) identity which I proved in my earlier video to derive a very useful trigonometric identity for sin(x + y) and sin(x -y).

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