when looking at a cartesian graph

by evilpostingmong
Tags: cartesian, graph
evilpostingmong is offline
Jun11-08, 04:40 PM
P: 341
should every whole number that curve x crosses be taken into consideration when
constructing a polar graph? For example, when y=1 is crossed, should the radius be drawn
on the polar graph if the x value is not an exact, uh, pi number (for example instead
of .77 which is pi/4 the x value that curve x crosses 1 is at .88 or something like that)
To see what I mean, graph 3cosx and look where y=2 is crossed (at x=.84). Should I ignore this point?
Phys.Org News Partner Science news on Phys.org
SensaBubble: It's a bubble, but not as we know it (w/ video)
The hemihelix: Scientists discover a new shape using rubber bands (w/ video)
Microbes provide insights into evolution of human language
HallsofIvy is online now
Jun12-08, 08:13 AM
Sci Advisor
PF Gold
P: 38,900
?? I have no idea what you are talking about. To perfectly graph a function, you have to take every number into account, not just whole numbers! To approximately graph a function, you need to decide how accurate you want to be as opposed to how much work you want to do. The only reason for using "pi numbers" (by which I take it you mean simple fractions of pi) is that they are easy- the same reason you might use whole numbers for Cartesian graphs. There is no "mathematical" rule.

Register to reply

Related Discussions
Cartesian product of cartesian products Set Theory, Logic, Probability, Statistics 4
Cartesian Equation Graph help Calculus & Beyond Homework 1
The Cartesian Product Set Theory, Logic, Probability, Statistics 9
Real life situation to a sin graph on position by time graph Differential Equations 6
Graph Theory -- How do I construct this graph? Calculus & Beyond Homework 2