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                                                                                                  I was doing conics one day when I thought of a faster way to graph them on the calculator.  The included programs graph conics, allow the user to trace the conic, and find derivatives/tangent lines at any point on the conics. (Even if they contain an 'xy' term!)
CONIC:  Enter coefficients of the equation AX^2+BXY+CY^2+DX+EY+F=0.  The program doesn't change window settings. Graphing takes 20 seconds.
	
	Both CONICDRV and CONITRAC assume the coefficients in variables A-F are correct.

CONICDRV: Find the two derivatives at a particular x- or y- coordinate, or the one derivative at an (x,y) pair.  Graphs tangent lines if prompted.
CONITRAC:  Traces conic.  If the x coordinate is invalid, no y value or cursor will be shown.  To switch 'branches' of the conic while tracing, press up or down.


If you find this useful, e-mail pac@printrak.com.
Bryan Catanzaro  1995                     w                                                                                                             ,            k  m                                                                ,      Arial                                                                                                                      