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
MHB Prove (a²+b²+6)/(ab) is a perfect cube
  • · Replies 2 ·
Replies
2
Views
2K
MHB Is the Absolute Value Inequality $|4x-5|-|3x+1|+|5-x|+|1+x|=0.99 Solvable?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate 4 parameter logistic model for fitting PCR data
  • · Replies 1 ·
Replies
1
Views
1K
Is StemWiki Hyperlibrary the Ultimate Resource for Math and Science?
  • · Replies 3 ·
Replies
3
Views
1K
MHB Find Area Problem in Multiple Choice Question
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Double sum of same variable simplification help
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad What is the significance of googolplex in mathematics and science?
  • · Replies 9 ·
Replies
9
Views
3K
MHB Looking Answer About Area of Circle.
  • · Replies 4 ·
Replies
4
Views
2K
MHB Prove that x²+y²+z² isn't prime
  • · Replies 2 ·
Replies
2
Views
2K
MHB How Does Modular Arithmetic Simplify Integer Divisibility Proofs?
  • · Replies 1 ·
Replies
1
Views
2K
MHB This is known as the Sector Area Formula.
  • · Replies 11 ·
Replies
11
Views
3K
MHB Prove the equation has no solution in integers
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Series with binomial coefficients
  • · Replies 4 ·
Replies
4
Views
1K
Graduate Help simplifying this using Stirlings' Formula?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad What is the theorem with the most proofs?
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad How to calculate the angles that define the position your arm is in
  • · Replies 5 ·
Replies
5
Views
2K
Graduate How to simplify using stirling approximation?
  • · Replies 2 ·
Replies
2
Views
1K
High School Understanding Tangent and Cotangent
  • · Replies 3 ·
Replies
3
Views
1K
High School Trouble understanding why two equations give the same result
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad 4Sine(4X) = -8Sin(2x) Double angle identity
  • · Replies 11 ·
Replies
11
Views
3K
Undergrad 30FPS displayed on a 200Hz monitor
  • · Replies 5 ·
Replies
5
Views
2K
MHB Bearing of A from B: 120 Degrees
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad How can x=tan(x)cosh2(x) be solved using trigonometry?
  • · Replies 10 ·
Replies
10
Views
2K
MHB Modular arithmetic and factorials
  • · Replies 12 ·
Replies
12
Views
5K
MHB Prove a given number is an odd integer
  • · Replies 3 ·
Replies
3
Views
2K
MHB Can $k>1$ Prove This Inequality?
  • · Replies 2 ·
Replies
2
Views
2K
MHB Solving for $k$: $k^2=x+y$ and $k^3=x^2+y^2$
  • · Replies 1 ·
Replies
1
Views
1K
High School How do you find the area of a circle?
  • · Replies 4 ·
Replies
4
Views
2K
High School How would you do this equation on paper 1/2 x 26 x 10
  • · Replies 4 ·
Replies
4
Views
1K
Graduate Absolute value of exponentials being multiplied
  • · Replies 9 ·
Replies
9
Views
1K
Graduate Prove recurrence relation via mathematical induction
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad General Formula for the Reciprocal of a Sum of Reciprocals
  • · Replies 2 ·
Replies
2
Views
7K
MHB Is there a relationship between pi, physics, and probability?
  • · Replies 1 ·
Replies
1
Views
2K
High School Getting worse at mental arithmetic
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Rewrite the trigonometric expression as an algebraic equation
  • · Replies 6 ·
Replies
6
Views
1K
Graduate Adjacent vertices in convex polygons
  • · Replies 3 ·
Replies
3
Views
2K
MHB Proof that x=0 for Integers with Perfect Square Property
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Why does Carmichael's function mean what it does?
  • · Replies 1 ·
Replies
1
Views
1K
High School Exponents & Mods: What You Need to Know
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Find the pattern: 12, 44, 130, 342, 840
  • · Replies 33 ·
2
Replies
33
Views
3K
Undergrad What is the Hyperoperation Hierarchy and How Does it Work?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Universal? or Multiple Units of Measure?
  • · Replies 2 ·
Replies
2
Views
1K
MHB Trig Challenge: Solutions to $\sin a \sin (2a) \sin (3a)$?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Not seeing things in physics and mathematics.
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Looking for a insightful roadmap to learn math
  • · Replies 7 ·
Replies
7
Views
9K
MHB Primitive Roots Modulo $p$: The $(p-1)/2$ Rule
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Sum and difference with radians.
  • · Replies 3 ·
Replies
3
Views
4K
Graduate How to best read Euclid's Elements
  • · Replies 3 ·
Replies
3
Views
10K
Undergrad The Binomial Series: Extending the Validity?
  • · Replies 6 ·
Replies
6
Views
2K
MHB Circumference and Area of A Circle
  • · Replies 8 ·
Replies
8
Views
2K
High School Tangent zeros with a calculator?
  • · Replies 6 ·
Replies
6
Views
1K
Undergrad Can Complex Numbers Bridge the Gap Between Algebra and Geometry?
  • · Replies 1 ·
Replies
1
Views
2K
High School I badly with general answers to trig equations. (Using identities)
  • · Replies 32 ·
2
Replies
32
Views
3K
Undergrad How to tell how many answers there are? (Trig equations)
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Function notation and shifting functions
  • · Replies 3 ·
Replies
3
Views
2K
MHB How to find currents and voltages with 2 batteries connected?
  • · Replies 1 ·
Replies
1
Views
2K
MHB Variable Pi Formula: Diameter (mm) Calculation
  • · Replies 1 ·
Replies
1
Views
2K
MHB Square Roots Calculation Tricks
  • · Replies 18 ·
Replies
18
Views
3K
MHB Understanding Voltage and Current: How Reference Points Affect Calculated Values
  • · Replies 4 ·
Replies
4
Views
2K
MHB Voltage Across 10, 20uF Capacitors in RC Circuit
  • · Replies 11 ·
Replies
11
Views
3K
Undergrad What is the significance of cubic in a cubic spline?
  • · Replies 6 ·
Replies
6
Views
4K
High School Perpendicular geometric objects
  • · Replies 13 ·
Replies
13
Views
2K
MHB Need Sum of Formula [shortcut]
  • · Replies 2 ·
Replies
2
Views
2K
MHB Can Every Natural Number be Expressed as a Sum of Square Roots?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad How can I accurately model a sine wave using popsicle sticks?
  • · Replies 3 ·
Replies
3
Views
1K
Graduate How Many Valid Orderings Avoid Neighboring Duplicates in Mappings from N to M?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Efficiently Simplifying Nested Logarithms: A Scientist's Guide
  • · Replies 3 ·
Replies
3
Views
2K
High School How TI-89 Calculator Rearranged Exponent Confusion - Ben
  • · Replies 2 ·
Replies
2
Views
1K
Graduate How to express cos(theta)cos(phi) in spherical harmonics
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Cos^2+Sin^2 = 1 even with coefficients?
  • · Replies 7 ·
Replies
7
Views
7K
High School Length of a missing side no angle given :(
  • · Replies 5 ·
Replies
5
Views
2K
MHB Summing Formula Problem [Again]
  • · Replies 2 ·
Replies
2
Views
1K
MHB Fast Calculation [sum] problem
  • · Replies 1 ·
Replies
1
Views
1K
Graduate How to simplyfy a square root term? Phonon dispersion relati
  • · Replies 1 ·
Replies
1
Views
1K
MHB Proving $\sin\left(10^{\circ}\right)$ is Rational or Irrational
  • · Replies 2 ·
Replies
2
Views
1K
High School Polynomial fractions simplest form?
  • · Replies 10 ·
Replies
10
Views
4K
Graduate What Are the Mysteries of 4D Space and Hypercubes?
  • · Replies 25 ·
Replies
25
Views
5K
High School Tan^2x =sec^2x-1 also: tan= sec -1 or am I missing something?
  • · Replies 7 ·
Replies
7
Views
2K
MHB Applying function to entire side of equation, not just terms
  • · Replies 1 ·
Replies
1
Views
2K
MHB Help with Quadratic Equations by completing the square
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad What are some recommended books on RNA and Graph Theory?
  • · Replies 1 ·
Replies
1
Views
1K
MHB Therefore, the roots of the given equation are $x=-4$ and $x=2$.
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Understanding square root of a polynomial
  • · Replies 10 ·
Replies
10
Views
3K
Undergrad How to solve for x? (2/9)x^2 + (4/3)x > 0.5^x
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Designing function that draws specific output
  • · Replies 4 ·
Replies
4
Views
1K
MHB Calculate w/ Defective Calculator: Multiply w/ Add, Subtract, & Reciprocal
  • · Replies 11 ·
Replies
11
Views
3K
Graduate Solution to a system of transcendental equations
  • · Replies 17 ·
Replies
17
Views
2K
Undergrad Trigonometry just the conversion factor of coordinate types?
  • · Replies 5 ·
Replies
5
Views
1K
MHB Prove (p+r)(p+s)(p+t)(p+u)=(q+r)(q+s)(q+t)(q+u)
  • · Replies 3 ·
Replies
3
Views
2K
MHB Triangle Challenge: Prove 2.5<PQ/QR<3
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad How to approximate the rate of growth of an integer sequence?
  • · Replies 12 ·
Replies
12
Views
2K
Undergrad Papers on Calculus of Variations
  • · Replies 2 ·
Replies
2
Views
1K
MHB Solving for Primes and Evens: $x^n+x^{n-1}+\cdots+x+1=y^2+y+1$
  • · Replies 2 ·
Replies
2
Views
1K
MHB Length of a side, possible triangle side
  • · Replies 3 ·
Replies
3
Views
3K
MHB Find the Smallest Angle for sin theta+5cos theta=4 | Trigonometric Equation Help
  • · Replies 3 ·
Replies
3
Views
2K
MHB Analyzing Electromagnetic Forces in a Two-Sphere System with Insulating Fiber
  • · Replies 1 ·
Replies
1
Views
2K
Graduate The Perfect Square: Leonardo DaVinci's Renaissance Discovery
  • · Replies 10 ·
Replies
10
Views
2K
MHB Polynomial Challenge: Show $f(5y^2)=P(y)Q(y)$
  • · Replies 2 ·
Replies
2
Views
2K
MHB Help with Unfinished Problem: File Size Issues
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad A good place to find out the meaning of basic math terms
  • · Replies 6 ·
Replies
6
Views
1K