Posts: 306

Threads: 3

Joined: Sep 2009

I am unable to reproduce your error. I get 7.0E-8

A couple of questions:

-In the answer, is that e the normal (2.71828...) e?

-Do you have E defined to be a variable with a value?

-Can you explain *exactly* what you're doing?

Example, I am in RPN mode, enter 70E-9 *cos(0) in single quotes, and hit EVAL (or simplify, whatever) and get 7.0E-8

Posts: 850

Threads: 10

Joined: Mar 2009

Hi Juraj,

I confirm I get the same strange result when using SIMPLIFY and low display digits in Exact Mode. This seems to be a problem with version 2.15 of the calculator firmware. In version 2.09 it will request Approx. mode and display the correct answer.

To others,

Just entering the equation with EVAL it seems it always gets the right answer, irrespective of display digits setting.

To reproduce the error:

Have version 2.15 and set display to either FIX 1, SCI 1 or ENG 1

Enter the equation in Equation Writer, select it completely and use SIMP

or

enter the equation on the command line '70E-9·COS(0)' go to CONVERT -> REWRITE -> SIMPLIFY

*EDIT:*

Further to the above: it seems also to be a problem with the 50g association of integers and exact mode, and floating numbers and approx. mode.

Enter the equation as:

(70/1000000000)*COS(0)

and it will simplify it correctly.

Thus the v. 2.09 response is correct to request Approx. Mode because of the 70E-9. It does not request it when 70/1000000000 is entered. The 50g is wrong by just giving an answer that is incorrect. Something broke here between 2.09 & 2.15.

*Edited: 7 Nov 2012, 6:48 a.m. *