Differentiating Trigonometric Identities Cos z and Sin z for Complex z

Описание к видео Differentiating Trigonometric Identities Cos z and Sin z for Complex z

Fortunately for students, the differentials of complex functions follow the same rules as for real functions, but for different reasons. In this video we show why d/dz (cos z) = - sin z and vice versa for complex 'z', with help from the hyperbolic functions sinh z and cosh z, as well as the Cauchy Riemann equations.

For more on calculus of complex numbers see our playlist 'Calculus of Complex Numbers' at    • Calculus of Complex Numbers  

For more practice with complex numbers see our playlist 'Complex Numbers' at    • Complex Numbers  

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