How to graph r=4/costheta-sintheta
should i change it to rectangular form to graph it? is there any technique to graph directly from a polar equation?
Technique is unique: take theta, calculate R, and put the point (theta,R) on graph ( in polar coordinates).
That is it :))
how do i get r in my abovementioned equation if i dont have the values of x & y? Can you do the technique on my eqtn so that i can visualize it? thanks so much!
Well: You simply don't care about x and y. You'll be working in (theta, r) coordinates (polar that is) instead of (x,y) decartian ones. So, if for a given theta you can surely find corresponding r from your formual, then first set of (theta, r) u have already.
just vary theta (say 30, 60, 90 , 120 ... degress) and find corresponding r's. and each pair of (theta,r) put on graph ...
message if something is not clear.
all the best:)