Sum to product identities are
Last updated at May 30, 2018 by Teachoo
Sum to product identities are
Transcript
cos x + cos y = 2 cos (x+y)/2 cos (x -y)/2 cos x - cos y = - 2 sin (x+y)/2 sin (x -y)/2 sin x + sin y = 2 sin (x+y)/2 cos (x -y)/2 sin x - sin y = 2 cos (x+y)/2 sin (x -y)/2
Cos x + cos y formula
cos x + cos y formula
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