SOLUTION: How to prove prove sin(a + b) = sin(a)cos(b) + cos(a)sin(b) (even graphically)

SOLUTION: How to prove prove sin(a + b) = sin(a)cos(b) + cos(a)sin(b) (even graphically)

Algebra.Com

Question 125246: How to prove prove sin(a + b) = sin(a)cos(b) + cos(a)sin(b) (even graphically)
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Look at the following website for a very elegant proof.
http://www.cut-the-knot.org/proofs/sine_cosine.shtml
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