Fooling the CASIO ClassWiz fx-991LA X
05-15-2017, 04:14 AM (This post was last modified: 05-15-2017 12:23 PM by Gerson W. Barbosa.)
Post: #6
 Gerson W. Barbosa Senior Member Posts: 1,396 Joined: Dec 2013
RE: Fooling the CASIO ClassWiz fx-991LA X
(05-15-2017 01:33 AM)Paul Dale Wrote:  Very nice approximation correct to fourteen digits!

Code:
3.1415926535897111461 3.1415926535897932384                ^^^^^^

The second is π.

Pauli

Notice $$ln(100\pi)=5.749900072$$ is close to 23/4 (but not close enough).

I like the following better, found with help of HP-32SII solver:

$$\ln\left(\frac{16\ln\left(878\right)}{\ln\left(16\ln\left(878\right)\right)}\r​ight)$$

Five digits reused once yielding 10 correct digits.

Gerson.

Edited. Trouble with LATEX here on Chrome, so I've added a picture. Also, I cannot link the CASIO WES website here, the address between quotes above.
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 Messages In This Thread Fooling the CASIO ClassWiz fx-991LA X - Gerson W. Barbosa - 05-14-2017, 10:41 PM RE: Fooling the CASIO ClassWiz fx-991LA X - lrdheat - 05-15-2017, 01:23 AM RE: Fooling the CASIO ClassWiz fx-991LA X - Gerson W. Barbosa - 05-15-2017, 02:58 AM RE: Fooling the CASIO ClassWiz fx-991LA X - lrdheat - 05-15-2017, 01:32 AM RE: Fooling the CASIO ClassWiz fx-991LA X - Paul Dale - 05-15-2017, 01:33 AM RE: Fooling the CASIO ClassWiz fx-991LA X - Gerson W. Barbosa - 05-15-2017 04:14 AM

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