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    Proof of Trignometric Relationship Using Complex Numbers

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    Given that cos x=(e^jx + e^-jx)/2 and sin x=(e^jx - e^-jx)/2j

    Using ONLY this information, prove that: cosAsinB=1/2[sin(A+B)- sin(A-B)].

    See the attached file.

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    Solution Summary

    A trignometric relationship is proven using complex numbers. The solution is detailed and well presented.