Solving Trig Equations for a Certain Domain - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: HP Prime (/forum-5.html) +--- Thread: Solving Trig Equations for a Certain Domain (/thread-1694.html) Solving Trig Equations for a Certain Domain - Pre - 06-23-2014 12:34 PM I'm not sure how to receive the answers in terms of pi to equations like in the attachment to a certain domain. With no arguments, the answer (pi*n, ((4*pi*n)-pi)/4) is displayed. But to restrict to an interval like 0 to 2*pi, I can only find this (see picture). [attachment=880] Although the solutions are displayed, they are in numeric form. How can I display the exact answers (0, 3pi/4, pi, 7pi/4) on the calculator? I am using Rev 6031 on the emulator. RE: Solving Trig Equations for a Certain Domain - CR Haeger - 06-23-2014 02:55 PM This should work. I used algebraic entry but textbook should work. Remember to purge(x) otherwise the assume(x....) remains. [attachment=883] RE: Solving Trig Equations for a Certain Domain - Pre - 06-23-2014 03:57 PM I didn't know that was there, but it works perfectly. [attachment=885] Couldn't you also use the pipe key, though? The N-Spire does something like that. RE: Solving Trig Equations for a Certain Domain - CR Haeger - 06-23-2014 04:23 PM Yep you are right, the "where" | works too without having to purge(x) --> thanks! add solve(tan...)|(x>0 AND x<2*pi) RE: Solving Trig Equations for a Certain Domain - Pre - 06-23-2014 05:17 PM I tried doing the same before, but I had improper syntax. Thanks for giving me the proper form. RE: Solving Trig Equations for a Certain Domain - alexzkter - 06-24-2014 10:42 AM How exactly can I find the pipe symbol ? Thanks Edit: Found it, on Chars, the 124th. RE: Solving Trig Equations for a Certain Domain - CR Haeger - 06-24-2014 11:59 AM (06-24-2014 10:42 AM)alexzkter Wrote:  How exactly can I find the pipe symbol ? Thanks Edit: Found it, on Chars, the 124th. Also check math template key. Easier.