The Emperor's New Mind: Concerning Computers, Minds, and the Laws of Physics (Oxford Landmark Science)

by Roger Penrose

sin (A + B) = sin A cos B + cos A sin B, cos (A + B) = cos A cos B – sin A sin B, are simply the imaginary and real parts, respectively, of the much simpler (and much more memorable!) complex equation* eiA + iB = eiA eiB.

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