Hi there,

I am stuck on a proof using complex numbers. I have tried almost everything but I seem to get nowhere. Here is the question .

Let a,b be complex numbers. Prove that sin(a+b)= sinacosb + sinbcosa

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- Nov 25th 2010, 05:30 AMKelvinSccProof of Sine Addition Formula with complex numbers
Hi there,

I am stuck on a proof using complex numbers. I have tried almost everything but I seem to get nowhere. Here is the question .

Let a,b be complex numbers. Prove that sin(a+b)= sinacosb + sinbcosa - Nov 25th 2010, 05:43 AMPlato
This is just a tedious problem.

Use $\displaystyle \sin (z) = \dfrac{{e^{iz} - e^{ - iz} }}

{{2i}}\;\& \,\cos (z) = \dfrac{{e^{iz} + e^{ - iz} }}

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