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
Undergrad Why do we have both sine and cosine?
  • · Replies 6 ·
Replies
6
Views
5K
MHB Maximum Value of k in $(1+\frac{1}{a})(1+\frac{1}{b}) \ge k$ is 9
  • · Replies 4 ·
Replies
4
Views
2K
High School Solving an exponential equation
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Projectile motion and SUVAT equations
  • · Replies 3 ·
Replies
3
Views
3K
MHB Help converting two standard form equations to slope intercept form?
  • · Replies 8 ·
Replies
8
Views
3K
MHB Geometry Challenge: Prove $PT+PU\ge 2\sqrt{2}p$
  • · Replies 5 ·
Replies
5
Views
2K
MHB How Can Terrific Wears Inc. Maximize Revenue and Profit from Suit Sales?
  • · Replies 3 ·
Replies
3
Views
4K
High School How Can LCM Explain Planetary Alignments and Spacecraft Timing?
  • · Replies 6 ·
Replies
6
Views
3K
MHB How can we prove the inequality $|b^2-4ac|\le |B^2-4AC|$ with given conditions?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Solving Math Blog Problem - Gaussianos.com
  • · Replies 2 ·
Replies
2
Views
1K
MHB What Is the Smallest Multiple of 2013 That Solves This System of Equations?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad What the terms orthogonal & basis function denote in case of signals
  • · Replies 2 ·
Replies
2
Views
2K
Expansion of the exponential function
  • · Replies 2 ·
Replies
2
Views
2K
MHB Calculating Force for Lever Push - 600N
  • · Replies 1 ·
Replies
1
Views
2K
Wave your hands in the air like you 're a mathematician
  • · Replies 5 ·
Replies
5
Views
1K
High School Does the Identity Sin² x + Cos² x = 1 Apply to All Multiples of x?
  • · Replies 4 ·
Replies
4
Views
2K
MHB How to distribute square roots without making common mistakes?
  • · Replies 3 ·
Replies
3
Views
2K
MHB Solve 2sin(2x-π/2) +1 Equation for Sine Curve
  • · Replies 2 ·
Replies
2
Views
3K
MHB What Are the Key Differences Between Fixed and Movable Pulleys in Physics?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad How is the binomial theorem used here?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Angular magnification what is angle subtended?
  • · Replies 3 ·
Replies
3
Views
2K
MHB Solving a Simultaneous Equation Problem
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Converting a number back to its positional values
  • · Replies 13 ·
Replies
13
Views
2K
High School Coterminal Angles: Negatives in Radians Explained
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Rotating an Array: Seeking Help with Maths Skills
  • · Replies 2 ·
Replies
2
Views
2K
MHB Basic symbology for involving a series but without summation necessarily
  • · Replies 1 ·
Replies
1
Views
2K
MHB How Can You Multiply Ciphertexts in ElGamal Without Decrypting?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Evaluating the Svein-Graham Sum
  • · Replies 2 ·
Replies
2
Views
1K
MHB How Can We Prove \(a+b^2+c^3+d^4 \le a^2+b^3+c^4+d^5\) Given \(a+b+c+d=4\)?
  • · Replies 2 ·
Replies
2
Views
2K
MHB Finding Triples to Satisfy $\frac{5}{2}$
  • · Replies 2 ·
Replies
2
Views
1K
MHB Did John Profit from His Apple Sales Strategy?
  • · Replies 1 ·
Replies
1
Views
4K
High School Perceived Height of 38m Object at 1600m Distance
  • · Replies 16 ·
Replies
16
Views
4K
High School Finding a cube root of a number without using calculator .
  • · Replies 4 ·
Replies
4
Views
6K
High School What's is the best way to indicate a vector
  • · Replies 15 ·
Replies
15
Views
2K
Graduate Number Theory & Calculus Theorems: Looking for Interesting Ones to Prove
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Apparent trigonometric inconsistencies
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Calculate No. of Spheres to Cover 50% of a 25m^2 Square
  • · Replies 1 ·
Replies
1
Views
1K
High School Converting recurring decimals to fractions new formula
  • · Replies 18 ·
Replies
18
Views
3K
High School Find the zeroes of r. What to do when it is a multiple of theta?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad How many potential ingress glyphs are there?
  • · Replies 3 ·
Replies
3
Views
2K
MHB What Does the Encircled Equation Mean?
  • · Replies 3 ·
Replies
3
Views
2K
MHB What is the minimum value of y in the Absolute Value Function?
  • · Replies 3 ·
Replies
3
Views
2K
MHB Prove a system has no real solutions
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Calculating the suns path in sky
  • · Replies 1 ·
Replies
1
Views
1K
MHB Find Real Triples $(a,b,c)$ for 20c-16b^2=9
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad How Does Fourier Math Apply to Image Processing?
  • · Replies 2 ·
Replies
2
Views
2K
High School Nice grouping of primes under 105
  • · Replies 7 ·
Replies
7
Views
2K
High School If t^2 = x can't I just replace t^2 with x?
  • · Replies 2 ·
Replies
2
Views
964
MHB How Close is 1 UK Quart to US Quarts?
  • · Replies 6 ·
Replies
6
Views
3K
MHB Solving for $\theta$ and $H$ in Trig Equation
  • · Replies 6 ·
Replies
6
Views
2K
High School How can I factor these polynomials?
  • · Replies 5 ·
Replies
5
Views
2K
High School My Struggle with Math: Understanding Real-World Applications
  • · Replies 60 ·
3
Replies
60
Views
7K
Undergrad I think I may be on the verge of something BIG
  • · Replies 8 ·
Replies
8
Views
1K
Undergrad Physically what is phase of an Image?
  • · Replies 7 ·
Replies
7
Views
2K
High School Is a line the same as distance?
  • · Replies 11 ·
Replies
11
Views
2K
High School Simplifying A Fraction That Can't Be Simplified
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Solving equation with two different variables
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Why cross product has a direction but dot product doesn't?
  • · Replies 7 ·
Replies
7
Views
2K
High School What is the equation for predicting the middle number in Pascal's triangle?
  • · Replies 6 ·
Replies
6
Views
2K
MHB Right Angled Triangle: Find $\sin(\theta)$
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Proving Equivalence of Decimals in Number Theory
  • · Replies 1 ·
Replies
1
Views
1K
Graduate General Equation of the Line of the Major Axis of an Ellipse
  • · Replies 1 ·
Replies
1
Views
2K
MHB Evaluate $b_1^2+5b_2^2$ Given $a_1^2+5a_2^2=10$
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Can the Inequality x^x + y^y < (x+y)^(x+y) be Proven Algebraically?
  • · Replies 3 ·
Replies
3
Views
2K
MHB Find Real Solutions for Equation $(x^2+2x+3)(x^2+x+1)(5x+3)=1001$
  • · Replies 2 ·
Replies
2
Views
1K
Graduate What does the exponential term mean in Fourier transform
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Is Brocard's Problem the Key to Solving Infinite Solutions?
  • · Replies 1 ·
Replies
1
Views
2K
Introduction to Graph Theory Book
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Equation of a line segment in 3D?
  • · Replies 3 ·
Replies
3
Views
5K
MHB Function of Sawtooth Wave with Variable Peaks
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Finding the The Power of CDC Computers
  • · Replies 6 ·
Replies
6
Views
2K
Graduate An argument for "Brocard's problem has finite solution"
  • · Replies 13 ·
Replies
13
Views
3K
MHB Area of a region in Rectangle: very tough question
  • · Replies 2 ·
Replies
2
Views
5K
MHB Value of $\dfrac{2k^2}{k-1}$: Solving the Equation
  • · Replies 2 ·
Replies
2
Views
2K
MHB Simplifying Expression: $\frac{z^2(w-x)(x-y)}{(w-x)(x-y)(y-w)}$
  • · Replies 3 ·
Replies
3
Views
2K
MHB How can I solve the equation 8a³-1=4a+6a¹/³+1 in the real number system?
  • · Replies 7 ·
Replies
7
Views
2K
High School How do I graph in vertex form with an equation like (x+1/2)^2 = 12(y - 3)?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate What type of transfer function is represented by this plot?
  • · Replies 3 ·
Replies
3
Views
1K
Graduate Are there solutions to 4m^(n)=n^(2m) with m,n in Z+
  • · Replies 4 ·
Replies
4
Views
1K
High School Can You Solve the Viral Math Problem About Cheryl's Birthday?
  • · Replies 2 ·
Replies
2
Views
2K
High School Analytical Geometry: Definition & Basics | Mahmoud
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Can I Find an Analytical Solution for Spherical Trilateration?
  • · Replies 6 ·
Replies
6
Views
4K
MHB What is the Solution to $4\sin(x)+3\cos(x)\geq0$ in Terms of Domain and Range?
  • · Replies 2 ·
Replies
2
Views
2K
MHB Evaluating $f(15)$ without a Calculator
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Find if two triangles intersect in 3D environment
  • · Replies 5 ·
Replies
5
Views
3K
High School The Mystery of .999... and .333...: A Math Puzzle
  • · Replies 37 ·
2
Replies
37
Views
6K
High School Solve x^2+2^x=100: Step-by-Step Guide for Clear Understanding
  • · Replies 6 ·
Replies
6
Views
5K
MHB Find the sum of all possible values
  • · Replies 2 ·
Replies
2
Views
2K
MHB Show $n\equiv 1 \pmod 9$ for Even Perfect Numbers $n>6$
  • · Replies 3 ·
Replies
3
Views
2K
High School How to Solve Exponents that also has a variable with it
  • · Replies 3 ·
Replies
3
Views
2K
High School Strange Pattern with Logarithms
  • · Replies 2 ·
Replies
2
Views
1K
What Are the Different Ways People Think About Math?
  • · Replies 9 ·
Replies
9
Views
3K
Graduate Riemann on Deductive vs Creative Reasoning
  • · Replies 2 ·
Replies
2
Views
2K
High School Is the Pythagorean Theorem Applied to Determine the Length of AB?
  • · Replies 13 ·
Replies
13
Views
3K
Undergrad Usefulness of Euler line in triangles?
  • · Replies 1 ·
Replies
1
Views
6K
High School Is the square root of 4 a constant?
  • · Replies 10 ·
Replies
10
Views
5K
High School Questions on Trigonometric equation solving
  • · Replies 14 ·
Replies
14
Views
4K
MHB Finding a Quadratic Function from a Vertex
  • · Replies 2 ·
Replies
2
Views
4K
MHB Minimum of $a$ for $a^2+2b^2+c^2+ab-bc-ac=1$
  • · Replies 1 ·
Replies
1
Views
2K
MHB What are the Values of k that Satisfy the Given Equation?
  • · Replies 3 ·
Replies
3
Views
2K