Casio FX991EX

[Albert Chan]

(07-15-2018 09:17 AM)Tugdual Wrote:  The solar cell is a disappointment. If you remove the LR44 battery the calculator will power up
and perform basic calculations but a sum will shut it down.

Even under good light ?
Is it possible it were still doing sum but don't have the juice to show it ? :-D

Anyway, solar + battery is better than battery alone.

My Casio FX-115MS had a dead battery, but still work under good light.
The back is somehow stuck even with all 3 screws removed (glued stuck ?)
Cannot replace battery without breaking the calculator ...

FX-115MS also had some weird precedence, had FX-991EX fixed it ?

Keys: 6 / 2 ( 1 + 2 ) ==> 1 ?
Keys: SQRT 6 RCL Y ==> sqrt(6 * y) instead of sqrt(6) * y

Keys: SIN ( 30 DEGREE ) SQR ==> 0 ?

Above actually does sin(30 ^ 2) = sin(900) = sin(0) = 0
To do sin(30) ^ 2, had to do ( SIN 30 DEGREE ) SQR ==> 0.25