- #1

newbie7.07

- 7

- 0

(ns

^{2}cot(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)

(na

^{2}tan(180/n))/4

(nr

^{2}sin(180/n)cos(180/n))/4

Has someone found this before?

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- Thread starter newbie7.07
- Start date

- #1

newbie7.07

- 7

- 0

(ns

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

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

(na

(nr

Has someone found this before?

- #2

Integral

Staff Emeritus

Science Advisor

Gold Member

- 7,253

- 63

Yes, I find it on page 122 of my copy of CRC Standard Math tables. (27th ed)

- #3

Manchot

- 473

- 4

No offense, but that's not really an equation you can "discover." It's just a calculation.

- #4

Werg22

- 1,427

- 1

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.

- #5

jim mcnamara

Mentor

- 4,688

- 3,630

Ah.. I see you folks have never read Plato. Or won't admit to it anyway.

- #6

Manchot

- 473

- 4

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.Werg22 said:In mathematics there is no such thing as discovery.

- #7

newbie7.07

- 7

- 0

Ok, then can anyone who's read something about this explain why cot(180/n)=tan(90(n-2)/n)?

- #8

Dr Avalanchez

- 18

- 0

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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