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+--- Thread: NaN message? (/thread-6007.html)
NaN message? - Tim O - 04-08-2016 08:32 PM
I am trying to integrate the function f(x)=ln(2+sin(x)) from x=3 to 5 and I get NaN message.
Can someone tell me why?
RE: NaN message? - lrdheat - 04-08-2016 09:58 PM
I get a complex answer in CAS, an invalid input message in HOME. Physical software version 7820, and same behavior on iPad emulator.
RE: NaN message? - roadrunner - 04-08-2016 10:31 PM
(04-08-2016 08:32 PM)Tim O Wrote: I am trying to integrate the function f(x)=ln(2+sin(x)) from x=3 to 5 and I get NaN message.
Can someone tell me why?
Try this:
∫(ln(2+sin(x)),x,3.0,5)
Note the 3 is typed 3.0 not just 3
Then you get about 0.555 for an approx answer. It's an approx/exact issue.
-road
RE: NaN message? - informach - 04-09-2016 02:03 AM
Hi!, all:
If configure HP PRIME, for CAS and in CAS Setting in Approximate mode, Standar mode with 12 digits, the result is ... 0.555085197181
In Plot, if any value, of function is <=0, the result is NaN (Not an Number).
See, the attachment's in HP PRIME and Wolfram Alpha.