It makes sense to solve the inequality cos(z)greater than 1 with z complex.
Apparently it may seem a contradiction since the complex field is not ordered. However, by applying some basic notions it is possible to determine infinite points of the complex plane that make the inequality true.
To better understand the lesson it is advisable for the student to have some basics on hyperbolic functions and their graphs.
For those who want to learn more here is the link
• Funzioni iperboliche seno iperbolico senh ...
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