For all complex numbers z for which the expressions are defined,  

            [Graphics:Images/ComplexFunTrigMod_gr_57.gif]  

Exploration for the identities.

 

 

[Graphics:../Images/ComplexFunTrigMod_gr_61.gif]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(c) 2006 John H. Mathews, Russell W. Howell