(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find all roots of the equation cos(z)=2 (z is a complex number)

2. Relevant equations

3. The attempt at a solution

What do they mean find the roots of this equation? We're just going over trig functions and it doesn't say anything about roots so I'm not sure what they're asking for. when I looked on the internet I just kept getting things raised to 1/n. I don't see that all here.

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# Roots of complex equation

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