Give details in the derivation of expressions (2), Sec. 34, for the derivatives of sin z and
Question:
cos z.
d/dz sin z = cos z and d/dz cos z = - sin z.
It is easy to see from definitions (1) that the sine and cosine functions remain odd and even, respectively:
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Related Book For
Complex Variables and Applications
ISBN: 978-0073051949
8th edition
Authors: James Brown, Ruel Churchill
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