35
Chapter 3: Manual Calculations
To access the second function of a key (printed above the keys in
yellow), press and release
@
, then press the key you want to
use.
s
Enters an arc sine function to be used in a trigonometric expres-
sion.
Example
• Calculate arc sine 1.
@
s
1
E
.
c
Enters an arc cosine function to be
used in a trigonometric expression.
Example
• Calculate arc cosine 0.5.
@
c
0.5
E
.
t
Enters an arc tangent function to be used in a trigonometric
expression.
Example
• Calculate arc tangent 1.
@
t
1
E
.
Note:
Expressions with inverse trigonometric functions evaluate in the
following ranges.
θ
= sin
-1
x
,
θ
= tan
-1
x
θ
= cos
-1
x
Deg: 0
≤
|
θ
|
≤
90
Deg: 0
≤
|
θ
|
≤
180
Rad: 0
≤
|
θ
|
≤
π
2
Rad: 0
≤
|
θ
|
≤
π
Grad: 0
≤
|
θ
|
≤
100
Grad: 0
≤
|
θ
|
≤
200
z
Accesses the VARS menu. Refer to chapters 9 to learn how to
use each item in this menu.
z
Enters a variable “X” (rectangular) and “T” (parametric). Use this
key when working with graph equations. Refer to Chapter 4 to
learn how to use this feature.
Second
functions
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