Sharp EL-9450 Operation Manual page 42

z
z
Second
functions
s
c
t
Note:
Accesses the VARS menu. Refer to chapters 9 to learn how to
use each item in this menu.
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.
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.
Enters an arc sine function to be used in a trigonometric expres-
sion.
Example
• Calculate arc sine 1.
@ s 1 E.
Enters an arc cosine function to be
used in a trigonometric expression.
Example
• Calculate arc cosine 0.5.
@ c 0.5 E.
Enters an arc tangent function to be used in a trigonometric
expression.
Example
• Calculate arc tangent 1.
@ t 1 E.
Expressions with inverse trigonometric functions evaluate in the
following ranges.
θ = sin x, θ = tan
-1 -1
x
Deg: 0 ≤ | θ | ≤ 90
π
Rad: 0 ≤ | θ | ≤
2
Grad: 0 ≤ | θ | ≤ 100
Chapter 3: Manual Calculations
θ = cos
-1
x
Deg: 0 ≤ | θ | ≤ 180
Rad: 0 ≤ | θ | ≤ π
Grad: 0 ≤ | θ | ≤ 200
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