Does this equation already exist?

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Discussion Overview

The discussion revolves around a proposed formula for calculating the area of a regular polygon based on its side length, as well as related expressions involving the radius and apothem. Participants explore the nature of mathematical discovery and the existence of the formula in existing literature.

Discussion Character

  • Exploratory
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • One participant presents a formula for the area of a regular polygon using side length and questions if it has been previously discovered.
  • Another participant claims to have found the formula in a standard reference book, suggesting it is not a new discovery.
  • Some participants argue about the concept of mathematical discovery, with differing opinions on whether a formula can be "discovered" or if it is merely a calculation.
  • A participant references Plato in relation to the philosophical aspects of discovery in mathematics.
  • There is a request for clarification on the relationship between cot(180/n) and tan(90(n-2)/n), indicating a desire for deeper mathematical understanding.
  • A suggestion is made to apply Simpson's formulas to address the question posed about the cotangent and tangent relationship.

Areas of Agreement / Disagreement

Participants express differing views on the nature of mathematical discovery, with no consensus reached on whether the formula is new or merely a calculation. The relationship between cotangent and tangent remains a point of inquiry without a clear resolution.

Contextual Notes

Some statements reflect philosophical positions on discovery in mathematics, which may depend on individual interpretations and definitions. The discussion includes unresolved mathematical relationships and assumptions about the formulas presented.

newbie7.07
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This is a formula to find the area of a regular polygon with sides of equal length only using the side length.

(ns2cot(180/n))/4

Where n is equal to the number of sides and s is the side length.

Also, knowing radius (r) or apothem (a)

(na2tan(180/n))/4

(nr2sin(180/n)cos(180/n))/4

Has someone found this before?
 
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Yes, I find it on page 122 of my copy of CRC Standard Math tables. (27th ed)
 
No offense, but that's not really an equation you can "discover." It's just a calculation.
 
Manchot said:
No offense, but that's not really an equation you can "discover." It's just a calculation.

In mathematics there is no such thing as discovery.
 
Ah.. I see you folks have never read Plato. Or won't admit to it anyway.
 
Werg22 said:
In mathematics there is no such thing as discovery.
Yes, there is. Just because a certain theorem happens to be true whether it's been found or not, it doesn't mean that it can't be discovered. "Discover" in this case simply means that you are the first human being to stumble upon it.
 
Ok, then can anyone who's read something about this explain why cot(180/n)=tan(90(n-2)/n)?
 
newbie7.07 said:
Ok, then can anyone who's read something about this explain why cot(180/n)=tan(90(n-2)/n)?

Just apply Simpson's formulas.
 

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