Logarithmic spiral

i know that they are used in nature very often whit the constant (phi) in it. but how do i make one of these on the graph? i checked on http://en.wikipedia.org/wiki/Logarithmic_spiral

and they say r=ab^(theta) but then whats a and b? what do they represent in this equation?

Here... try this instead:

http://www.sparknotes.com/math/preca...section3.rhtml

they seem to know more about it than the wiki does..

And you need to know a little about Polar Coordinates as well.

thanks, but the problem now is that the exponetial stuff makes it impossible for me to see the spiral :confused:

Originally Posted by zelos

thanks, but the problem now is that the exponetial stuff makes it impossible for me to see the spiral :confused:

use the zoom function on your TI83 orTI89 and you shoud be fine

done it, the corvate is still to big to see it