HP Forum Archive 21

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Another HP Prime CAS question Message #1 Posted by Michael de Estrada on 7 Nov 2013, 11:03 a.m. When I enter COS(x)^2+SIN(x)^2 in CAS I get the result 1, which is correct since this result is true regardless of the value of x. However, if I enter COSH(x)^2-SINH(x)^2 in CAS I should also get 1 as a result, however, I simply get COSH(x)^2-SINH(x)^2 as a result instead. If I replace x with a numerical value instead, then I get the proper result of 1. Why ? And yes I am in radians mode and have Exact unchecked when I do this. Edited: 8 Nov 2013, 2:35 p.m. after one or more responses were posted

Re: Another HP Prime CAS question Message #2 Posted by Michael de Estrada on 8 Nov 2013, 10:23 a.m., in response to message #1 by Michael de Estrada Hello. Anybody home ?

Re: Another HP Prime CAS question Message #3 Posted by Han on 9 Nov 2013, 9:03 a.m., in response to message #2 by Michael de Estrada Quote: Hello. Anybody home ? This is probably explained somewhere in the xcas documentation (regarding whether there exist substitution/simplification routines for hyperbolic trig functions.

Re: Another HP Prime CAS question Message #4 Posted by Michael de Estrada on 9 Nov 2013, 10:56 a.m., in response to message #3 by Han Actually, I reposted this question and it was answered here.

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