SOLUTION: Verify the identity.
sin (x + y) - sin (x - y) = 2 cos x sin y
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Question 641428: Verify the identity.
sin (x + y) - sin (x - y) = 2 cos x sin y
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
sin(x + y) - sin(x - y) = 2cos(x)sin(y)
sin(x)cos(y) + cos(x)sin(y) - (sin(x)cos(y) - cos(x)sin(y)) = 2cos(x)sin(y)
sin(x)cos(y) + cos(x)sin(y) - sin(x)cos(y) + cos(x)sin(y) = 2cos(x)sin(y)
2cos(x)sin(y) = 2cos(x)sin(y)
So that verifies the identity
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