12
just want to square number 2, press the squared-key shortly and you will get the
result with the equals-key.
5.2.3: Roots
To extract a square root, type in the number and shortly press the square root key
(3 x 3 group, row 2, right key) followed by the equals-key.
To extract any root, type in the number and press and hold the square root key (3 x
3 group, row 2, right key). Now enter the order of the root and press the equals-key.
The order of the root does not have to be an integer.
Example:
To calculate the third root out of 8 press digit key number 8, than press
and hold the square root key (3 x 3 group, row 2, right key). Now enter digit number
3 for the root of third order, followed by the equals-key. Platon XL will give the result
“22”. To calculate the second root out of 8, press digit key number 8, than press the
square root key shortly followed by the equals-key. The square root of 8 will be
displayed.
5.2.4: Reciprocal Value
To calculate the reciprocal value, type in a number and press and hold the ‘change
sign’ key (3 x 3 group, row 3, right key) followed by the equals key.
5.2.5:
(Pi)
To calculate with the number
(Pi), press digit key 3 in level 2 (3 x 3 group, row 1,
left key and than in the 4 x 4 group row 3 column 3).
5.2.6: Change Sign
Press the “change sign” key shortly to change the sign of a value (3 x 3 group, row
3, right key).
5.3: Scientific Functions
As scientific functions Platon offers you trigonometric functions, logarithms and
hyperbolic functions, as well as their inverse functions. With the 4 x 4 group keys in
level 2 or level 3 you select the scientific functions. Use the shift key to change to
level 2, 3 or back to base level. The shift-key is the left key in row 1 in the 3 x 3
group. A short press activates the second level (“shift 2”) of functions connected to
the keys and pressing long activates the third level (“shift 3”). Press the shift key
several times to switch between all the 3 levels. When entering base level a short
beep signal is played. To calculate with a scientific function, first enter a value then
choose the function.
Example:
Calculation of cosine(0). Enter number 0. Choose the function cosine.
Press the equals-key to get the result “1”.
