14
Getting started
Explicit and
implicit
multiplication
Implied
multiplication takes place when two operands
appear with no operator in between. If you enter
AB
, for
example, the result is
A*B
.
However, for clarity, it is better to include the
multiplication sign where you expect multiplication
in an
expression. It is clearest to enter
AB
as
A*B
.
Parentheses
You need to use parentheses to enclose arguments for
functions, such as SIN(45). You can omit the final
parenthesis at the end of an edit line. The calculator
inserts it automatically.
Parentheses are also important in specifying the order of
operation.
Without
parentheses, the HP 39gII calculates
according to the order of
algebraic precedence
(the next
topic). Following are some examples using parentheses.
l
4
S
EEX
-
13
m
sl
6
S
EEX
23
m
n
3
S
EEX
-
5
E
Entering...
Calculates...
e
45
+S
π
sin (45 +
π
)
e
45
m+S
π
sin (45) +
π
Sj
85
s
9
Sjl
85
s
9
m
85
9
×
85
9
×
Summary of Contents for 39gII
Page 1: ...HP 39gII graphing calculator user s guide Edition1 Part Number NW249 90001 ...
Page 2: ...Printing History Edition 1 November 201 1 ...
Page 32: ...22 Getting started ...
Page 58: ...48 Apps and their views ...
Page 70: ...60 Function app ...
Page 80: ...70 Solve app ...
Page 136: ...126 Polar app ...
Page 140: ...130 Sequence app ...
Page 148: ...138 Finance app ...
Page 152: ...142 Linear Solver app ...
Page 218: ...208 Matrices ...
Page 226: ...216 Notes and Info ...
Page 238: ...228 Variables and memory management ...
Page 318: ...308 Programming ...
Page 340: ...330 Reference information ...
Page 346: ...vi Product Regulatory Information ...