8
row 2,
right key
short = square root
long = roots
level 2 = announce date
row 3,
left key
short = left parenthesis
row 3,
middle key
short = right parenthesis
row 3,
right key
short = change sign
long = reciprocal value
level 2 = 10 to the power of
4.1.3: 4 x 4 Group (from left to right)
row 1,
left key
digit 7
level 2 = sinus
level 3 = arcsine
row 1,
column 2
digit 8
level 2 = cosine
level 3 = arccosine
row 1,
column 3
digit 9
level 2 = tangent
level 3 = arctangent
row 1,
right key
short = divided by
long = modulo
level 2 = change display
row 2,
left key
digit 4
level 2 = hyperbolic sine
level 3 = area hyperbolic
sine
row 2,
column 2
digit 5
level 2 = hyperbolic cosine
level 3 = area hyperbolic
cosine
row 2,
column 3
digit 6
level 2 = hyperbolic tangent
level 3 = area hyperbolic
tangent
row 2,
right key
short = times
long = percent
row 3,
left key
digit 1
level 2 = natural logarithm
level 3 = e to the power of
x
row 3,
column 2
digit 2
level 2 = common logarithm
level 3 = 10 to the power of
x