Sharp EL-9900 - Manual (Page 31)

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Chapter 2: Operating the Graphing Calculator
c Enters an arc cosine function at the cursor
t Enters a tangent function at the cursor
t Enters an arctangent function at the cursor
l Enters a logarithm function at the cursor
0 Enters “10 to the x th power”, then sets the cursor at the “ x ”
I Enters a natural logarithm function at the cursor
@ Enters “ e -constant to the power of x ”, then sets the cursor at the
“ x ”
X Enters a variable “ x ”, “
θ”, “T”, or “ n ”. The variable is automatically
determined according to the calculator’s coordinate setup: “ x ” for
rectangular, “ θ” for polar, “T” for parametric, “ n ” for sequential.
y Enters “ 2 ” at the cursor, to raise a number to the second power
x Enters “ - 1 ” at the cursor, to raise a number to the negative first
power
d Enters a mixed number.
b Enters a fraction.
a Enters an exponent.
_ By itself enters a “root” figure; the cursor will be set at “a”, the
depth.
Common Math Function
keys for both keyboards: