Need help for some HP Prime calculus/functions

[Devil69]

(12-23-2019 10:06 AM)Nigel (UK) Wrote:  

(12-22-2019 07:36 PM)Devil69 Wrote:  Hi Nigel thank you very much I followed your instructions and it finally worked!
I think HP should add the variable "k" for trig (in)equations in their future update to do these operations without assume() function so that the answer looks like this:
x>π/6+2kπ and x<5π/6+2kπ, k∈ℤ

Glad to help. I agree with you about including an integer in the solution. The strange thing is that the Prime already does this when solving trigonometric equations: try solving \(\sin(x)=\frac12\), with "Principal" unticked in the CAS settings. So the mechanism is there, but for some reason it isn't applied to inequalities.

Nigel (UK)

After unticking Pricipal in CAS settings and trying to solve \(\sin(x)=\frac12\), I have this result:

(12*n_24*π+π)/6, (12*n_24*π+5*π)/6, what does mean 12*n_24*π ?

Thanks