formulas

  1. T

    Deriving the constant acceleration formulas using functional notation.

    Hi, So I was trying to develop a more in-depth understanding of the constant acceleration equations, especially v^2 = u^2+2as. I found a video showing the derivation of this formula: JnFykw00HvE His logic goes like this. 1: Acceleration is the derivative of velocity w.r.t. time. a = dv/dt...
  2. J

    How to rewrite these formulas in the opposite form?

    I want to know how I can write from some predicate formula its negative form. For example ∀x∃y(x R y) then not(∀x∃y(x R y)) is equal to ∃x,not ∃y(x R y)))(not exist y) How do these formula work with conjunction implication and disjunction? Bellow are examples of some formulas but...
  3. P

    Reference / book that shows geometrical proof to formulas?

    Hi MMF, returning to math study, I understand concepts best when seeing things visually, like Pythagorean Theorem proof, completing the square, unit circle etc. What's a good reference site and/or book that gives visual diagrams, even up through Calculus if possible?
  4. P

    Why are things squared in formulas about light, space etc.

    As a beginning math student I've wondered: why is the square prominent in math formulas about the natural world, instead of the circle? Circular light beams, elliptical solar systems and galaxies, Inverse Square Law, seem to me better defined in terms of the circle than squares, which don't...
  5. M

    Square root formulas

    I deduced a simpler formula for the square root using only one trigonometric function "acos", it is a controllable precision formula in advance, the correct decimals 2n are controlled by choosing n, based on the discovery of a pattern, the square root is proportional to the angle...
  6. G

    elliptic curve formulas derivation for bitcoin usage

    How can one derive the underlined formulas that is used in point addition of elliptic curves? The text is taken from: https://en.wikipedia.org/wiki/Elliptic_curve_point_multiplication
  7. N

    Double and Half Angle Formulas

    I'm really in a bad mood and need help solving these two problems. I had a terrible Pre-Calculus teacher and know almost nothing about Trigonometry. We're starting to move more into Trig in my Calculus class and I'm lost. This is a formula I want to learn more about and I've tried to familiarize...
  8. J

    Having trouble with formulas (Equations & Transpositions)

    Solve for A b = 1/2h (A + C) My first step is to minus C on both sides so I got b - C = 1/2h A then i flip the 1/2 to 2/1 so it's b - C = 2h A My second step is to divide both sides by 2h.. b-c/2h = A But in my text book it says the answer is A = 2b/h - C I don't get it...
  9. A

    New Formulas for Kolakoski sequence

    Hi everybody, here's the link to a new paper about the Kolakoski Sequence A000002, on Turkish Journal of Analysis and NUMBER THEORY: Some new Formulas for the Kolakoski Sequence A000002. Thanks All.
  10. B

    Isolate 2 variables in 2 formulas

    I am developing a robotic arm and I need to know the angles of 2 parts of this arm (bars) and I have 2 variables with 2 formulas and I tried my best and I still can't isolate those 2 variables. In the formulas below, [A,B,C,D] are constants, and [x,y] are variables in degrees (not radians)...
  11. C

    Math formulas android app

    Hi! Here is an android app with basics math formulas pack: https://play.google.com/store/apps/details?id=com.yorikylapps.math.mathformulas There are a tons of such apps on various stores, but many of them contain formulas as png pictures, so if you try to scale the image on your phone you'll...
  12. P

    Interesting thing about graphs (adding x! to formulas)

    I was just playing with a graph drawing software and noticed something very interesting. The graph of y = x! , when going further into negative X, turned into a straight line with infinitely long vertical lines coming out of it to both positive and negative Y at every whole number. Basically it...
  13. B

    Brackets in formulas

    Hi all, Please can someone help me understand the brackets in the formulas I have attached? I am assuming that they some other meaning than conventional rounded brackets. Any info gratefully received. Thanks Martin
  14. N

    Calculus Modeling Formulas-Seasons and Months

    The following formula is a mathematical model for the number of hours of daylight on the t day of the year: L(t)=12+2.9sin[2pi/3659(t-80)] 1. Use this model to compare how the number of hours of daylight is increasing from a) March 21st-June 21st b) June 21st-Sept 21st c) Sept 21st-Dec 21st...
  15. AbrahamA

    Book of Odd, Volume I | 1700 TVM formulas

    1 Generic TVM Equation = 1700 TVM formulas Here is the Book of Odd, Volume I https://www.dropbox.com/s/dknr9l61i130du4/book_of_odd_volume_i.pdf?dl=0 All praise to Odd Here is the Windows app based on Book of Odd, Volume I...
  16. S

    Free program that calculate Math formulas for free

    Hello, I have created a program for the community, which can solve some formulas and etc. At the moment, it can solve: 1. Brenoly Math - 2. Equation formula ax^2+bx+c 3. Arithmetic progression - 4. Cubic Formula - Example : ax^3+bx^2+cx+d Also, if the community wants, I will be able to make...
  17. P

    Formulas for Lowering Powers

    Nevermind. Sometimes, we can have brain farts. We can get caught up in the advanced parts of math that the simple stuff can sometimes throw us off.
  18. D

    What and When

    I am really having a hard time understanding which formula to use for which type of problem or when to use a certain formula.:confused: I see when working problems that if I work it too long to get the answer, I should not have. And if I don't work a problem long enough, I should have kept on...
  19. D

    Can't remember my probability formulas

    I'm trying to resolve what I thought was a fairly simple problem, but I haven't managed to get a good answer yet. I want to figure out the odds of getting at least one successful outcome in a series of identical events. I.E., if the odds are 1 in 250, and I make 25 attempts, what are the...
  20. E

    Is This True About Summation Formulas?

    I looked up that the summation formula for x^3 is the square of the summation formula for x. In other words (1 + 2 + 3 +…)^2 = 1^3 + 2^3 + 3^3 + … and I want to know if that means the summation formula for x^6 would be the square of the summation formula for x^2 because (x^3)^2 = x^6 and...