Sum to product identities are
Cos x + cos y formula
cos x + cos y formula
Last updated at Dec. 16, 2024 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