HP48GX - How to plot tangent line of function? - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: General Forum (/forum-4.html) +--- Thread: HP48GX - How to plot tangent line of function? (/thread-9300.html) HP48GX - How to plot tangent line of function? - thomasross - 10-15-2017 07:42 PM Hello, If I have a function plotted is there a way to quickly plot the tangent line at a point? RE: HP48GX - How to plot tangent line of function? - joeres - 10-15-2017 11:35 PM (10-15-2017 07:42 PM)thomasross Wrote:  Hello, If I have a function plotted is there a way to quickly plot the tangent line at a point? Hello, use softkey "TANL" in picture "FCN" menu. See user guide (http://www.hpcalc.org/details/3937), page 22-11 (295). Kind regards, Joerg RE: HP48GX - How to plot tangent line of function? - thomasross - 10-16-2017 01:10 AM (10-15-2017 11:35 PM)joeres Wrote:   (10-15-2017 07:42 PM)thomasross Wrote:  Hello, If I have a function plotted is there a way to quickly plot the tangent line at a point? Hello, use softkey "TANL" in picture "FCN" menu. See user guide (http://www.hpcalc.org/details/3937), page 22-11 (295). Kind regards, Joerg Thanks but that seems to only display the equation of the function - is there a way to plot it? RE: HP48GX - How to plot tangent line of function? - joeres - 10-16-2017 04:32 PM (10-16-2017 01:10 AM)thomasross Wrote:  Thanks but that seems to only display the equation of the function - is there a way to plot it? Example: Or did I misunderstand something? kind regards Joerg RE: HP48GX - How to plot tangent line of function? - ttw - 10-16-2017 06:01 PM You could take the derivative of the function and plot that with the same axes and scaling.