# Thread: Differentiating a formula for area of polygons

1. ## Differentiating a formula for area of polygons

Hi guys

Could someone please tell me how to differentiating this particular formula with step by step directions?

$\displaystyle A=(22500/n)/tan(Pi/n))$

Thanks in advance. As soon as possible if you can

2. Hi Delos

$\displaystyle A=\frac{\frac{22500}{n}}{\tan (\frac{\pi}{4})}$

$\displaystyle A=\frac{22500}{n\; \tan (\frac{\pi}{4})}$

Can you differentiate $\displaystyle n\; \tan (\frac{\pi}{4})$ ?

3. Originally Posted by Delos
Hi guys

Could someone please tell me how to differentiating this particular formula with step by step directions?

$\displaystyle A=(22500/n)/\tan(\pi/n))$

Thanks in advance. As soon as possible if you can
You can't differentiate a function of a discrete variable (number of sides).

CB

4. Originally Posted by songoku
Hi Delos

$\displaystyle A=\frac{\frac{22500}{n}}{\tan (\frac{\pi}{4})}$

$\displaystyle A=\frac{22500}{n\; \tan (\frac{\pi}{4})}$

Can you differentiate $\displaystyle n\; \tan (\frac{\pi}{4})$ ?
That is not the area formula.

CB

5. Hi CaptainBlack

Sorry for not realizing it and thx for correcting my mistake