General Math Forum

Post thread
Join in expert discussion on general math topics that are not applicable to the specific categories. This includes topics are usually high school math level. Homework help is available.

Math Proof Training and Practice

A gap in resources that should help students visualise mathematics

Math Guides, Tutorials and Articles

MHB Deriving the first and second order Newton-Cotes formulas

Math Problem of the Week

Undergrad Sum of an Alternating Series
High School Why is the quadratic formula giving me the wrong answers for 4x^2+10x=5?
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Neverneverland and the three old men
  • · Replies 14 ·
Replies
14
Views
5K
Undergrad Alternative equation for a line
  • · Replies 4 ·
Replies
4
Views
3K
High School What are the coordinates of the incentre of a triangle?
  • · Replies 1 ·
Replies
1
Views
3K
High School I've always thought you cannot add up denominators
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad Need a Math Refresher? Check Out Khan Academy!
  • · Replies 4 ·
Replies
4
Views
8K
Solving the Mystery: Why Phi is Limited to 0-Pi in Spherical Coord System
  • · Replies 6 ·
Replies
6
Views
44K
Why do I now have 618 posts? 8128 is a perfect number of posts to have...
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad The Greatest Discovery in Maths
  • · Replies 9 ·
Replies
9
Views
15K
High School Is Using a Calculator Necessary for Solving Precalculus Problems?
  • · Replies 12 ·
Replies
12
Views
4K
  • Poll Poll
Mathematics Spelling: Singular or Plural?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Can logarithms be applied to Modular arithmetic
  • · Replies 4 ·
Replies
4
Views
8K
Undergrad I need a good book for Linear and Non Linear Optimization
  • · Replies 1 ·
Replies
1
Views
13K
  • Poll Poll
High School Which is the correct answer for 48÷2(9+3): 2 or 288?
  • · Replies 117 ·
4
Replies
117
Views
272K
Graduate Analytically Solving higher-order Systems
  • · Replies 1 ·
Replies
1
Views
2K
High School Clearing fractions and setting up for the quadratic formula?
  • · Replies 20 ·
Replies
20
Views
7K
High School IB Extended Essay topic in mathematics?
  • · Replies 5 ·
Replies
5
Views
12K
High School Solving Equations: Understanding Factoring and Finding Solutions
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Can two blackbody emitters combine to act like one emitter?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Pascal Triange - Fibonacci Sequence
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Can You Solve This Tricky Geometric Sequence Problem?
  • · Replies 10 ·
Replies
10
Views
4K
Undergrad What is the general equation for a mutating variable in a 3rd degree function?
  • · Replies 6 ·
Replies
6
Views
3K
Unbelievable: Jan 23 - 45 & 67 on 01234567
  • · Replies 3 ·
Replies
3
Views
3K
High School Hello friends,I have this problem I'm having difficulty
  • · Replies 2 ·
Replies
2
Views
2K
High School Difference between unit-fractional exponent and root sign
  • · Replies 8 ·
Replies
8
Views
3K
High School What are some interesting mathematical facts about the number 666?
  • · Replies 1 ·
Replies
1
Views
4K
High School Rearrangeing Inverse Hyperbolic functions
  • · Replies 5 ·
Replies
5
Views
3K
High School Trig Identity & Equations simplification
  • · Replies 3 ·
Replies
3
Views
5K
Undergrad Are My Trigonometric Equation Solutions Correct?
  • · Replies 5 ·
Replies
5
Views
3K
High School Solving for X in a Fractional Equation
  • · Replies 9 ·
Replies
9
Views
34K
High School Confirming Trigonometric Equation Solutions
  • · Replies 1 ·
Replies
1
Views
2K
Graduate A simple inequality with ellipses
  • · Replies 2 ·
Replies
2
Views
2K
Youthful Creativity: A New Idea for K-12 Students
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad How to Convert Parametric Equations into a Cartesian Equation in 3D Modelling?
  • · Replies 9 ·
Replies
9
Views
23K
Graduate What is the difference between ÷ and / in terms of Betti numbers?
  • · Replies 20 ·
Replies
20
Views
4K
Undergrad Irrational numbers in real life.
  • · Replies 20 ·
Replies
20
Views
8K
Undergrad How Do You Calculate the Age Ratio Between a Ship and a Boiler?
  • · Replies 9 ·
Replies
9
Views
6K
High School What are the real world applications of sine waves?
  • · Replies 11 ·
Replies
11
Views
4K
Undergrad What should I know to test out of Intro to Logic and Proof?
  • · Replies 1 ·
Replies
1
Views
2K
High School Why is (n^0=1)? where n is any positive number
  • · Replies 6 ·
Replies
6
Views
6K
High School How can I improve my proof-writing skills?
  • · Replies 12 ·
Replies
12
Views
5K
High School Truman Henry Safford - Legitimate, and if so, how?
  • · Replies 1 ·
Replies
1
Views
5K
High School If 3 cats eat 3 mice in 3 minutes; how many cats for 100 mice in 100 minutes?
  • · Replies 51 ·
2
Replies
51
Views
44K
High School Can you please explain how to factorize
  • · Replies 4 ·
Replies
4
Views
6K
Undergrad Calculating 3a-7b: Solving the Expression (2a-b-3)^2 + (3a+b-7)^2 = 0
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad How to Determine Counterfeit Coins with Only One Weighing
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Can We Find an Elegant Solution For a Less Than Function?
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad Can Bi-Quadratic Equations Be Represented in 3-Dimensional Graphs?
  • · Replies 4 ·
Replies
4
Views
3K
High School Should you interchange ÷ with / in mathematical equations?
  • · Replies 6 ·
Replies
6
Views
2K
High School How do I operate exponents on fractions?
  • · Replies 2 ·
Replies
2
Views
4K
High School Ambiguous Math: Juxtaposition vs Multiplication?
  • · Replies 5 ·
Replies
5
Views
4K
Undergrad Geometry of circles and polygons.
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Thomas Jefferson's Use of Calculus in Plow Design
  • · Replies 1 ·
Replies
1
Views
4K
Graduate What exactly is singularity? I was working with a friend earlier
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Polynomial Equation-Application
  • · Replies 1 ·
Replies
1
Views
3K
High School Solve 6/2(1+2): Debate on Facebook
  • · Replies 3 ·
Replies
3
Views
84K
High School How many solutions does the equation x^2= a have?
  • · Replies 19 ·
Replies
19
Views
4K
High School What is the largest number less than 1?
  • · Replies 97 ·
4
Replies
97
Views
44K
Undergrad Irrationality of the square root of a prime
  • · Replies 12 ·
Replies
12
Views
6K
Undergrad Proof By Induction (difficult problem)
  • · Replies 2 ·
Replies
2
Views
8K
Undergrad Is It Possible to Identify a Hidden Card from 27 Using Only Three?
  • · Replies 20 ·
Replies
20
Views
9K
Tingly feeling in brain after solving hard problem?
  • · Replies 13 ·
Replies
13
Views
3K
Undergrad What Is the Next Number in Holmes' Curious Sequence?
  • · Replies 6 ·
Replies
6
Views
9K
Undergrad How Is the Fourier Series Derived for Odd and Even Functions?
  • · Replies 7 ·
Replies
7
Views
3K
High School Units confusion in calculations
  • · Replies 9 ·
Replies
9
Views
2K
High School Can a Function Equal Zero with Non-Zero and Unknown?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad X^2-Y^2-Z^2: Exploring the Equation
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Partially rotated coordinate systems
  • · Replies 2 ·
Replies
2
Views
12K
High School What is the Significance of Mathematics in Science and Everyday Life?
  • · Replies 8 ·
Replies
8
Views
3K
Undergrad Is the Order of Operations Always Clear-Cut in Math?
  • · Replies 4 ·
Replies
4
Views
4K
High School What's the perfect mathematical formula for my next tattoo?
  • · Replies 25 ·
Replies
25
Views
4K
  • Poll Poll
Greatest mathematician of the 20th century
  • · Replies 20 ·
Replies
20
Views
10K
Undergrad Solving De Moivre's Theorem: Help Needed
  • · Replies 12 ·
Replies
12
Views
5K
High School Divide by Zero: How to Explain the Phenomenon
  • · Replies 11 ·
Replies
11
Views
7K
Undergrad Anyone Watch Fringe - Mysterious Equation
  • · Replies 6 ·
Replies
6
Views
3K
High School Difference Between Inverse & Reciprocal
  • · Replies 15 ·
Replies
15
Views
102K
Undergrad Molecules, atoms, quarks, and so on
  • · Replies 15 ·
Replies
15
Views
4K
Undergrad Multiplicative inverse of complex numbers
  • · Replies 3 ·
Replies
3
Views
13K
Undergrad What is the Notation for Sqrt(x^2) and (Sqrt x)^2 in Complex Numbers?
  • · Replies 14 ·
Replies
14
Views
3K
Undergrad Writing the domain of a function (some points to consider).
  • · Replies 2 ·
Replies
2
Views
5K
High School Set x Equal to Something: How to Use Brackets in a Function
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad How can we use math to communicate with aliens?
  • · Replies 1 ·
Replies
1
Views
2K
High School Proof of the Addition Identies
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad What functions are best for approximating the Least Square Method?
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Is 1-(sin^6x+cos^6x)=(3sin^2x)(cos^2x) a Valid Trigonometric Identity?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Notation Question: Constraining N to an Interval [-a,+a]
  • · Replies 2 ·
Replies
2
Views
2K
High School Can TEX be sent and read in email?
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad Can the Law of Cosines Solve the Distance Difference Problem?
  • · Replies 6 ·
Replies
6
Views
2K
High School Am I right, what's your opinion? trigonometry
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Need reference or derivation of Gamma function for half-integer orders
  • · Replies 1 ·
Replies
1
Views
4K
Undergrad Proving Trig Problem: sec (2x) - 1 = sin^2 x / 2 sec (2x)
  • · Replies 3 ·
Replies
3
Views
1K
High School How Do You Solve for Theta in Degrees When Given a Cosine Squared Equation?
  • · Replies 4 ·
Replies
4
Views
3K
High School Are Proportional Variables ALWAYS Multiplied/Divided from One Another?
  • · Replies 17 ·
Replies
17
Views
7K
Undergrad Trig/Algebra Question - Sailboat
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad How to solve exponential equations with unequal coefficients?
  • · Replies 2 ·
Replies
2
Views
3K
Is Mathematics A Talent or Skill?
  • · Replies 15 ·
Replies
15
Views
23K
High School How where all the possible tangents, cosines, and sines of angles found?
  • · Replies 7 ·
Replies
7
Views
4K
High School Help: Simple Algebra yet I fail
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Squaring out coordinates (with trig)
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Euler's proof of infinite primes and his product formula.
  • · Replies 9 ·
Replies
9
Views
8K