 Symbolic Calculus 50g - Printable Version +- HP Forums (https://archived.hpcalc.org/museumforum) +-- Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum-1.html) +--- Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum-2.html) +--- Thread: Symbolic Calculus 50g (/thread-162526.html) Symbolic Calculus 50g - Shu Y Pong - 01-28-2010 I am trying to figure out how to get the 50g to take the time derivatives symbolicly for r in dynamics problems. so r dot and r double dot as a function of theta. So the question is, is there a way to make the calculator see theta symbolicly as some unknown function of time instead of as a constant so that when it takes the derivative it executes the chain rule as it would if theta were a function instead of getting zero because it thinks theta is a constant. for instance if r = sin(theta) then r dot = cos(theta)*theta dot. instead the calculator just gives zero or if you take it with respect to theta then you just get cos(theta) Edited: 28 Jan 2010, 8:43 p.m. Re: Symbolic Calculus 50g - Norman Dziedzic - 01-28-2010 You have to tell the calculator that theta is a function of t. If you type in d/dt( cos ( theta(t) ) ) then you will get the result you expect. I get cos( theta(t) ) * d1 theta(t)