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

I have this weird quesiton in my text book I'm not even sure which part is the question and what i need to do...

It says

"Give details showing that the zeros of sinhz and coshz are as in statements (14) and (15) "

2. Relevant equations

(14) sinhz = 0 iff z=n(pi)i (n=0, +/- 1, +/- 2...)

(15) coshz = 0 iff z=(pi/2 + n(pi)) (n=0, +/- 1, +/- 2...)

-sin(iz) = sinh(z)

cos(iz) = cosh(z)

sinh(z) = [e^z - e^(-z) ] /2

cosh(z) = [e^z + e^(-z)]/2

3. The attempt at a solution

I haven't made a start on the quesiton because I don't understand the words and what it wants me to calc? :grumpy:

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# Homework Help: Sinhz = 0 iff z=n(pi)i (n=0, +/- 1, +/- 2 ) ~ a question about this?

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