<p>So I'm taking the sat soon and I was wondering, are there any formulas that I should store in my calculator? I was doing a practice test and forgot a formula for something about a circle when o realized I should just put it in the calculator.</p>
<p>Thanks!</p>
<p>I actually don’t know what the College Board’s official policy is on calculator programs, but assuming they allow them, the biggest time-savers, IMO, are:</p>
<p>-Distance Formula (sqrt((y1-y2)^2 + (x1-x2)^2)))
-Quadratic Formula ((-b +/- sqrt(b^2 - 4ac))/2a))
-Combinations + Permutations (these aren’t necessary to program into your TI-83/84 because they’re already in there, under the “MATH” menu)</p>
<p>Just remember not to go crazy using the programs during the test, because, if you are, chances are you’re making it too complicated!</p>