cos z = 2 i where z is a complex number, find z? and i is (iota)
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Hint :
I assume you mean that i is the imaginary unit . Anyway From the first equation, we have or which does not have any real solutions. Substituting x we find So there you have it, the solutions are .
the answer is (2n + 1)(pi/2) - i ( (-1)^n ) 1.443 where as I got (2n+1)(pi/2) + 1.443
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