Parametric calculator guide

Dedicated to Michael David Blumenfeld

FUNC <-> PAR mode:
- Hit the MODE button, next to the 2ND key.
- On the fourth line, highlight either FUNC or PAR.
- 2ND-QUIT. Done!
- Yes, this quickly becomes really, really annoying.

Entering a parametric equation:
- Ensure you're in PAR mode.
- With properly written equations (good luck!), enter into X1T and Y1T.
	- t is entered with the same button as the rectangular variable x- it's labeled X,T,Θ,n.
	- Remember, X1T(t) represents the horizontal distance traveled and Y1T(t) represents the height at t seconds.
- Hitting GRAPH in PAR mode will give a picture of the trajectory of the object in question.

Getting useful graphs of [something] over time:
- Switch to FUNC mode.
- To access your functions from parametric mode:
	- VARS -> Y-VARS -> Parametric...
- Enter Y1T(x) for height over time or X1T(x) for horizontal distance over time.
	- The rectangular variable X represents time; since Y1T(t) represents height at t seconds, Y1T(x) is height at x seconds.
- Everything you need from here should be available under the CALC menu.
- Converting from PAR to FUNC mode is necessary since the CALC menu options aren't accessible in PAR mode. Those idiots.

The annoying problems with two moving objects:
- Usually you'll find where the objects cross or get closest to each other.
- In PAR mode, enter in equations for the motion of the first object in X1T and Y1T.
- Enter in equations for the motion of the second object in X2T and Y2T.
- Y3T(t) will represent the distance between the two objects.
	- X3T(t) = t [don't think it matters. Just do it]
                    ___________________________________________
	- Y3T(t) = √[ (X1T(t) - X2T(t))² + (Y1T(t) - Y2T(t))² ]     (it's horrible, I know, but it's just distance formula. Whole thing is in that sqrt)

- Now you can graph Y3T(x) in rectangular mode and the function you receive will represent distance between the two objects over time.
- CALC -> minimum is your friend here

ALSO: Parametric graphs take an annoyingly long time to graph on a graphing calculator. Not much you can do about this.