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Definition. For z C we define ); cosh z =
 

Summary: Definition. For z C we define
cos z =
1
2
(eiz
+ e-iz
); sin z =
1
2i
(eiz
- e-iz
); cosh z =
1
2
(ez
+ e-z
); sinh z =
1
2
(ez

  

Source: Allard, William K. - Department of Mathematics, Duke University

 

Collections: Mathematics