Question about Texas Instruments TI-89 Calculator

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When I attempt a hyperbolic function of a complex number on my TI-89 titanium I get a domain error. Why is this?

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Posted on Oct 08, 2016

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Have you checked the calculator's manual to see if the calculator is able (natively) to handle functions of a complex argument. It is able to handle simple algebra with complex numbers, powers, roots, solving a polynomial equation.
For this calculator, the hyperbolic functions must have a real argument otherwise you get a domain error. But just to make sure, try the exponential function with i (imaginary unit) as argument. If it comes back with a domain error you have your answer.

Posted on Apr 09, 2011

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