Trig vs hyperbolic handling differences in Prime CAS  Printable Version + HP Forums (https://archived.hpcalc.org/museumforum) + Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum1.html) + Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum2.html) + Thread: Trig vs hyperbolic handling differences in Prime CAS (/thread255214.html) 
Trig vs hyperbolic handling differences in Prime CAS  Michael de Estrada  11082013 I posted this previously, but received no response so I'm trying again .
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)^2SINH(x)^2 in CAS I should also get 1 as a result, however, I simply get COSH(x)^2SINH(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.
Re: Trig vs hyperbolic handling differences in Prime CAS  Mark Hardman  11082013 Try using hyp2exp:
simplify(hyp2exp(cosh(x)^2sinh(x)^2))
Gives you the answer you are looking for.
Re: Trig vs hyperbolic handling differences in Prime CAS  Michael de Estrada  11082013 Thank you very much. Giving it some thought, this makes a lot of sense because while trig functions like cosine and sine are primary, hyperbolics like cosh and sinh are derived from the exponential function, which is primary.
Re: Trig vs hyperbolic handling differences in Prime CAS  Mark Hardman  11082013 Agreed. There is value in seeing the intermediate result of:
((exp(x)+1/exp(x))/2)^2((exp(x)1/exp(x))/2)^2
