<p>Hello everyone, I know programs are not favored publicly here but there comes a time where one can no longer retain anymore math formulas. So in this case, please post your favorite/most helpful math programs you discovered for the Math IIC. </p>
<p>Here are mine</p>
<p>Conic section
Formast
Polyops</p>
<p>How do you even get programs on your calculator? Do you download them from the Internet? I have a TI-84 Plus Silver, by the way, if that’s relevant at all.</p>
<p>elf4EVA, I can help you - I have the same calculator. Do you see the prgm button? It’s like in the middle-upper part of your calculator above cos.</p>
<p>Alright, so the programs I have are:</p>
<p>1) Finding the angle b/n the intersection of 2 lines (might seem random, but this appeared on the June test)
2) Area of any polygon (side length given)
3) Average rate when 2 rates are given (these are annoying and no, it’s not just the mean that we’ve all learned)
4) Finding distance from a point to a line (perpendicular distance)
5) Heron’s formula (find area of a triangle given the lengths of all the sides)
6) Variation of Heron’s formula if coordinates of a triangle are given
7) Law of cos</p>
<p>There are also the generic ones like midpoint, quadratic, and distance formulas.</p>
<p>If anyone wants any of the above formulas, tell me :3</p>
<p>Aquawater, yes, I see it. Now what should I do?</p>
<p>What’s the harmonic mean formula for average rates?</p>
<p>All I have is quadratic formula, what else should I get?
I’m thinking law of cosines and maybe Heron’s Formula. I don’t know how to do it though.</p>
<p>You don’t “need” programs on your calculator to do well on Math II. Most of these formulas can be inputted using a function (e.g. f(a,b,c): = (-b ± sqrt(b^2 - 4ac))/2a). I didn’t use any programs and still got 800.</p>
<p>@IceQube, the harmonic mean of n numbers a1, a2, …, an is</p>
<p>HM = n/((1/a1) + (1/a2) + … + (1/an))</p>
<p>All TI-84 programs have a Polynomial Solver application and regression features, learn how to use them because they will be very useful. You can also put notes when you make a new program. If you do this, try to get TiProgramEditor which lets you type in your stuff and transfer the programs to your TI-84 which is much more efficient.</p>
<p>aqua, can you please post the links to your programs they seem very helpful</p>
<p>*also is there a program where I can just input text from computer? (not tinotefolio too much to install)</p>
<p>elf4EVA, I’ll PM you separately to explain how to get to the different commands.</p>
<p>kharnage, here are your requested programs (my disp quotations are in separate lines b/c if you put the text all in one line, it’ll get cut off. You can omit the beginning disps if you remember what the formula is for):</p>
<p>1) Finding the angle b/n the intersection of 2 lines (might seem random, but this appeared on the June test)</p>
<p>Disp “FIND ANGLE B/N”
Disp “TWO LINES,”
Disp “CHANGE MODE TO”
Disp “DEGREES”
Disp “A IS SLOPE 1”
Prompt A
Disp “B IS SLOPE 2”
Prompt B
-tan^-1((A-B)/(1+AB)) -> θ
Disp “θ is”
Disp θ
Stop</p>
<p>2) Area of any polygon (side length given)</p>
<p>Disp “FIND AREA OF A”
Disp “REG POLYGON GIV”
Disp “SIDE LENGTH,”
Disp “MODE IS DEGREES,”
Disp “N IS NUMBER OF”
Disp “SIDES”
Prompt N
360/(2N) -> A
Disp “S=SIDE LENGTH”
Prompt S
(S/2)/tan(A) -> H
.5(SH) -> B
BN -> Z
Disp “AREA IS”
Disp Z
Stop</p>
<p>3) Average rate when 2 rates are given (these are annoying and no, it’s not just the mean that we’ve all learned)</p>
<p>Disp “FIND AVERAGE”
Disp “RATE GIVEN 2”
Disp “RATES, WHICH=”
Disp “A AND B”
Prompt A,B
2/((1/A)+(1/B)) -> R
Disp “AV RATE =”
Disp R
Stop</p>
<p>4) Finding distance from a point to a line (perpendicular distance)</p>
<p>Disp “FIND DISTANCE”
Disp “FROM POINT TO”
Disp “LINE, PUT LINE”
Disp “IN AX+BY+C=0”
Disp “FORM”
Prompt A, B, C
Disp “(X,Y) IS POINT”
Prompt X,Y
(AX+BY+C)/(√(A^2+B^2)) -> D
Disp “DISTANCE IS”
Disp D
Stop</p>
<p>5) Heron’s formula (find area of a triangle given the lengths of all the sides)</p>
<p>Disp “FIND AREA OF”
Disp “TRIANGLE GIVEN”
Disp “LENGTH OF SIDES”
Prompt A,B,C
(A+B+C)/2 -> S
√(S(S-A)(S-B)(S-C)) -> D
Disp “AREA IS”
Disp D
Stop</p>
<p>6) Variation of Heron’s formula if coordinates of a triangle are given</p>
<p>Disp “FIND AREA OF”
Disp “TRIANGLE GIVEN”
Disp “COORDINATES”
Disp “(A,B),(C,D),(E,”
Disp “F)”
Prompt A,B,C,D,E,F
√((A-C)^2+(B-D)^2) -> X
√((C-E)^2+(D-F)^2) -> Y
√((E-A)^2+(F-B)^2) -> Z
(X+Y+Z)/2 -> S
√((S)(S-X)(S-Y)(S-Z)) -> G
Disp “AREA IS”
Disp G
Stop</p>
<p>7) Law of Cos
Disp “C IS SIDE WITH”
Disp “DESIRED ANGLE,”
Disp “CHANGE MODE TO”
Disp “DEGREES”
Prompt A,B,C
cos^-1((C^2-A^2-B^2)/(-2<em>A</em>B)) -> E
Disp “ANGLE C IS”
Disp E
Stop</p>
<p>And the generic ones:</p>
<p>Midpoint (don’t think this is necessary, but it’s there for people who want it):</p>
<p>Disp “(A,B),(C,D)”
Prompt A,B,C,D
(A+C)/2 -> X
(B+D)/2 -> Y
Disp “MIDPOINT IS”
Disp “X”
Disp X
Disp “Y”
Disp Y
Stop</p>
<p>Distance:</p>
<p>Disp “(A,B),(C,D)”
Prompt A,B,C,D
√((A-C)^2+(B-D)^2) -> X
Disp “D IS”
Disp X
Stop</p>
<p>Quadratic formula:</p>
<p>Prompt A,B,C
B^2-4AC -> D
(-B+√(D))/(2A) -> X
(-B-√(D))/(2A) -> Y
Disp “ANSWERS ARE”
Disp X
Disp Y
Stop</p>
<p>For people who are really programming all of this into their calculator… take your time ^^</p>
<p>Do i essentially need a graphic calculator ?</p>
<p>Any programs to help with probability? I’ve never learned that.
Or Conic sections? I just don’t like them and keep forgetting how to do them.</p>
<p>@amremara you don’t really need a graphing calculator. Any basic scientific calculator will suffice for Math II, but you might need one for calculus classes and higher.</p>
<p>@runallday4 most of the SAT’s probability questions don’t require any complicated formulas (such as Bayes’ theorem). They can all be solved using elementary methods. For example,</p>
<p>Q. There is a 70% chance it will rain today, and a 60% chance it will rain tomorrow. What is the probability that it will rain on at least one of the two days?</p>
<p>You will see that it’s far less time consuming (and easier) to just solve the problem than look around for programs.</p>
<p>Also, what about conic sections do you forget/</p>
<p>^ Agreed. Ditch the programs and don’t rely on your calculator. The kid sitting next to me didn’t have a calculator and still got a 790 (he also fell asleep with 10 minutes left lol)</p>
<p>^There are many programs that can save you time. Such as the quadratic formula, area of a polygon, law of cos, etc. Finding programs for probability probably isn’t worth it, but some other formulas are.</p>
<p>Again, you don’t need calculator programs for Math II. I scored an 800 on Math II without using any “programs.” I think the only one I used was the linear regression (i.e. where you input a bunch of data and find the least squares line), but the TI-84’s and NSpires already come with that feature.</p>
<p>^ I agree with rspence. I didn’t use any programs and comfortably got an 800. It’s pretty unnecessary to have them.</p>
<p>It’s based on your comfort level. Some people feel more comfortable with programs already inputted in. I agree it’s definitely possible to easily get an 800 w/out any programs, but not everyone feels that way. I posted programs for anyone that would like to input them. People that have a hard time remembering certain formulas, especially on a timed test.</p>