5Show that | cos(z)|? = (cosx)? +(sinhy)? for all z € C, where x = Re(z) and y = Im(2).
Posted: Thu Jun 30, 2022 7:40 pm
5Show that | cos(z)|? = (cosx)? +(sinhy)? for all z € C, where x = Re(z) and y = Im(2).
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