The
Power
Function
(yx)
To
calculate
a
number,
y, raisedto a
power,
x, keyin y Ienter Ix
f>*1.
For y > 0, x can be any rational number. For y < 0, x must be an
integer. For y = 0, x must be positive.
For example:
To
Calculate:
Press:
Result:
152
151©
225.0000
2-14
2|ENTER|1.4|+/-II>*I
0.3789
(-1.4)3
1.4
I+/-II
ENTER
I 3 I>*I
-2.7440
$2 or
2,/3
2 | ENTER | 3
11/x
11y I
1.2599
Trigonometry
Entering
ir
Press
HIDE)
to place the first 12 digits of tt into the
X-register.
(The
number displayed depends on the display format.)
Because
this is a
function, ir does not need to be separated from another number by
I
ENTER
I.
Note
that
a calculator cannot exactly represent
-k,
since iris
an
irratio
nal
number.
Setting
the
Angular
Mode
The
angular
mode
specifies
which
unit
of measure to assume for
an
gles
used
in trigonometric functions.
The
mode
does not convert
numbers already present (see 'Conversion Functions* in this chapter).
56
4:
Real-Number
Functions
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