10 replies to this topic

[AdrianGin]

Given,

2^64 = 256^8

try it on your calculator!
What do you get?

To test go,
2^64 - 256^8
=

what do you get?
0 or do you have the special buggy model?

[Andy.Davies]

I get 0 (AFX Calc)

[huhn_m]

I get 0 as well (FX 1.0 ROM 1.03)

but even if I would not get 0 I wouldn't say it is a bug since in this
huge number range it is more like a rounding error. Be aware that 2^64 is bigger than a 64 bit number and therfor rounding errors are
likely to happen on 16 bit machines.

[liquid]

lol gin, how on earth u find this website,,,,,,and the chances of me being here 2

[pphilipko]

I get 0 on my fx-9860g.

btw, I got my calculator for $119.99 CDN. The SD model is not available in US/Canada (confirmed this with the Casio representative).

I am VERY pleased with my calculator. MUCH better than a Ti calculator (specifically the Ti -8x versions)

[R00KIE]

fx-82TL:0
CFX-9850GB PLUS:-700000
HP49G Aprox:0
HP49G Exact:0

Strange bug indeed, that's the type that makes you fail some exam

[genesis]

That's obviously going to give you errors, just like on all calcs that go up to 9.99...x10^99, if you type in (10^-50)^2, it gives you zero. This leads to strange results in equation solver, as the solution to X^2=0 is 10^-50 and it gives 10^-50 as a solution to the impossible (X^2)/X=0.

What I can't understand is why sin 45 - cos 45 = 10^-15 on the CFX models. It is the ONLY inaccurate trig value on the calculator and it just happens to be the most obvious by symmetry and exact values.

[R00KIE]

That's obviously going to give you errors, just like on all calcs that go up to 9.99...x10^99

Why?
2^64=~1.84467440737e19 and that is not even close to 9e99, i guess it is the way it is calculated, with sin and cos that's exactly that, with some calculators there are ways to get the pi value with twice the decimal places that the calculator gives by using the 'bug' of sin and cos functions

[genesis]

Those two phrases were unrelated, the reasoning for the first phrase is that the CFX only stores 15 digits (although I really think its 14 as the 15th digit doesn't always work) with the rest being 0's, and the second phrase continues on to the rest of my post.