I was functioning on mine homework for a measurements class and was utilizing excel when I found a function called SQRTPI(). Ns am an engineering significant who has taken countless math classes and I havent watched this before. Anyone care to explain where it would be used?

off the optimal of my head, it mirrors up in the gamma role (a way of prolonging the factorial to virtually all arguments): gamma(1/2) = sqrt(pi). It also turns up in the normal distribution , as a normalisation constant: this is a little bit of a cop-out though, as it's a factor of sqrt(2pi)

If you take the /2 out of the exponent the the common (i.e., use a Normal(mu,0.5)) then you obtain sqrt(pi) rather than sqrt(2pi). I don't think the there's noþeles really basic about the 2pi under there, regardless of all the debates (by using Hart and also others) that tau=2pi is the basic unit.

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Piggybacking top top this, the square source of pi shows up in the sensible equation for Riemann's Zeta duty on the Re s = 1 line.

It's a normalising aspect in the Gaussian integral, so is important and useful for functioning out Normal distribution stuff.

The square source of pi is the value of the integral of e-1/2*x2 from an adverse infinity to hopeful infinity. Coming from this definition, gamma(1/2) = square source of pi. Splitting the over integral by the square source of pi makes the integral evaluate to 1, make e-1/2*x2 a probability distribution. (specifically, a traditional Normal Distribution).

Interestingly, I in reality was figuring out something v this the other day. Ns was make the efforts to figure out a formula come measure how misshapen a form is. I want it to have the following properties:

1: It supplies Area and Perimeter together its inputs2: Scaling a form up or down doesn't affect the value3: A circle has actually value 14: A more misshapen shape has actually a bigger volume.

What I came up v was F(P,A)=P/(2sqrt(A*pi))

So, for a

Circle: F(2pi r,pir2 )=1Hexagon: F(6s,1.5sqrt(3)s2 )~1.05Square: F(4s, s2 ) ~ 1.13Equilateral triangle: F(3s,s2 Sqrt(3)/4)~1.29Isosceles appropriate triangle: F((2+sqrt(2))s,s2 /2)~1.36

I think those numbers are right. Ns was thinking about gerrymandering, for this reason that's how I came up through this.

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· 9y

That's neat, though the dependence on pi in the formula is that course only for the normalization. I think it could be a little an ext intuitive to usage F(P,A)=P/sqrt(A), in which case a circle provides 2sqrt(pi) and also a square provides 4.

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· 9y

So comparable to eccentricity?

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· 9y

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