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anonymous
 4 years ago
find all solutions for cos z = 2, z=x+iy?
anonymous
 4 years ago
find all solutions for cos z = 2, z=x+iy?

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0you need to start with \[\frac{1}{2}(e^{iz}+e^{iz})=2\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0then to \[e^{iz}+e^{iz}=4\] and then \[e^{2iz}+4e^{iz}+1=0\] solve the quadratic equation in \(e^{iz}\)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0typo i mean \[e^{2iz}4e^{iz}+1=0\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0cos never be 2 in maths
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