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- Origin of Radians [05/27/2002]
Where, exactly, did radians come from?
- Origin of the Quadratic Equation [7/12/1996]
Who discovered the Quadratic Equation?
- Origin of the Terms Sine, Cosine, Tangent, etc. [10/27/1999]
Can you tell me the origin of the terms hypotenuse, sine, cosine, and
tangent? Can you tell me how the trigonometric formulas for sine, cosine,
and tangent came about?
- Origin of the Term Vertical Angles [04/04/2005]
Why do we call them "vertical angles" when many of them are "horizontal" (extending left and right)? Where did that name come from?
- Origins and Originality [1/12/1995]
I have always wondered how the great mathematicians derived their
formulas based on nothing more than logic and tedious devotion. What are
the origins of math?
- Origins of the Fahrenheit Scale [11/20/1998]
Why did Fahrenheit choose 32 as the freezing point of water? Where did he
get his scale?
- Perpetual Calendar [10/21/1998]
How do you figure the perpetual calendar?
- Peter Lax [1/31/1996]
I am researching Peter Lax for a math project. Do you know of any Web
sites where I could find information about him?
- Plus and Minus Signs [08/14/2002]
What is the difference between the two signs ± and minus over the plus
- Polar Coordinates theta and r: Which Came First? [03/31/2017]
Comparing them to Cartesian coordinates, an adult finds inconsistency in the order of
polar form. Doctor Peterson shares historical references that support both (theta, r)
and (r, theta).
- Polygon Names II [12/11/2003]
Why is the triangle named "triANGL"', unlike all the other polygons, which have names like "quadriLATERAL" or "pentaGON"?
- Polynomials of the Fifth Degree and Above [07/28/2001]
I know how to find the root of a polynomial of the form: ax^2+bx+c=0. But
what about a polynomial of the third degree?
- Probability in the Infinite Plane [03/29/2003]
Three randomly drawn lines intersect so as to form a triangle on an
infinite plane. What is the probability that a randomly selected point
will fall inside that triangle?
- Proof of Fermat's Last Theorem [12/10/1996]
Can you tell me how Fermat's Last Theorem was proved?
- Proving Fermat's Theorem [6/22/1995]
Is Fermat's Last Theorem already proved?
- Questions About Math [07/31/1999]
Why was the Cartesian plane invented? Were the more abstract branches of
math developed just for fun? What is chaos theory? Why isn't Einstein's
equation e = mc^3?
- Ramanujan and a Formula for 1/Pi [04/06/1998]
Who is the man who knew infinity?
- Reverse Polish Notation [06/26/2002]
Where does the name 'Reverse Polish Notation' come from?
- Rhind Papyrus Problems [03/23/1999]
What equations were on the Rhind Papyrus?
- Riemann, Mayan Math [5/20/1996]
Math projects: A. Riemann - a German mathmatician; B. The Mayan number
system and calendar; C. Probability.
- Roman Numerals: Division [11/05/2001]
I have found information on how to add and multiply Roman numerals, but
have not found any information on how to divide or subtract.
- Rosetta Stone and the Rock at Behunistan [1/25/1995]
I am in a mathematics history class and I am looking for any information
relating to the Rosetta Stone used in Egypt and the Rock at Behunistan,
of the Babylonians.
- Rounding Pi [06/01/1999]
Can you prove that the value of Pi cannot be rounded down to 3.0? Is there an error in the Bible?
- Rule of Three [01/23/2002]
How high above the surface of the earth must a person be raised to see
1/3 (one third) of its surface?
- The Second Millennium [11/29/1999]
Does the second millennium begin with the year 2000 or the year 2001? How
does this relate to the math of counting numbers and subtraction?
- The Seven Bridges [8/28/1996]
What is the problem from the 1700s about a town with seven bridges, where
you want to cross each bridge exactly once?
- Short History of Geometry [09/15/2001]
Were there any people who helped to develop geometry besides Euclid?
- Simple Example of Ramanujan's Work [03/28/1999]
Ramanujan's contributions to the divisibility properties of partitions of
- Sine of 36 Degrees [11/18/2001]
Ptolemy calculated the sine of 36 degrees geometrically using the
construction of a regular pentagon. How did he do it?
- Sonya Kovalevskaya [11/19/1995]
Could you please advise me on where I can find information on a
mathematician by the name of Sonya Kovalevskaya?
- Sphere Surface Area Precision [04/22/2003]
How can the formula 4*pi*r^2 for the surface area of a sphere be
- Stokes-Greens-Gauss Theorems [03/25/1997]
Are the Stokes-Greens-Gauss) theorems related? What is their
- Subtracting Roman Numerals [03/14/1999]
What are the rules for the "subtraction components" in writing Roman
- Sum of Two Cubes [01/12/2002]
Find the smallest number that can be expressed as the sum of two cube
numbers in two different ways.
- Terms of the Cartesian Coordinates [12/01/1998]
In addition to abscissa and ordinate, is there a third name of the Cartesian coordinates for the z value?
- Theta [04/14/1997]
What is Theta? Does it have a constant value?
- Tower of Hanoi Problem [1/3/1995]
I gave my class the Tower of Hanoi problem and legend and, as a project,
with the aid of many towers we discovered the patterns for the tower and
when the world would end according to the legend. Where and when did the
- Trachtenberg Mathematics [12/08/1996]
I've been looking for a book I had a long time ago on the Trachtenberg
System of mathematics.
- Trisecting a Right Angle [12/16/1996]
An explanation of how to trisect a 90 degree angle, plus some
- Trivia about Famous Mathematicians [05/21/1998]
Interesting facts you might not know about 18 famous mathematicians.