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A Displaying a Built-in Formula
While inputting values for the variables of a formula, you can display the formula by pressing
(LOOK).
• If the formula is too long to fi t on the display use the
the missing part.
• To clear the formula from the display, press
k
Built-in Formula List
No. 01
Quadratic Equation Solution
Solves a quadratic equation using values you specify for
+
+
+
+
ax
ax
2
2
bx
bx
c
c
No. 02
Cosine Theorem
For a triangle for which the lengths of two sides (
are known, determines the length of remaining side.
+
+
a
a
b
b
2
2
c
c
2
2
=
=
No. 03
Heron's Formula
Determines the area (
−
−
S
S
s
s
s
s
a
a
=
=
(
(
)(
)(
a + b
a + b
>
>
> 0,
> 0,
c
c
(
(
No. 04
Normal Probability Function P(
Uses Hastings' estimate formula to determine the probability of a standard normal
x
distribution P(
) illustrated below when the standardized variate (
1
1
P
P
x
x
=
=
(
(
)
)
2 π
2 π
x <
x <
(0 ≦
(0 ≦
1
1
Important!
Since this is an estimate formula, proper precision may not be obtainable.
≠ 0,
≠ 0,
a
a
= 0
= 0
(
(
θ
θ
− 2
− 2
bc
bc
cos
cos
S
) of a triangle when the lengths of its three sides (
−
−
−
−
s
s
s
s
b
b
s
s
c
c
)(
)(
) ,
) ,
b + c
b + c
>
>
> 0,
> 0,
a
a
2
2
t
t
x
x
∫
∫
−
−
e
e
dt
dt
2
2
∞
∞
−
−
×
×
50
50
10
10
)
)
(Value Input Screen)
(EXIT) or A .
− 4
− 4
b
b
2
2
ac
ac
≧ 0)
≧ 0)
b
c
and
>
>
<
<
θ
θ
b
b
c
c
(
(
,
,
0, 0˚
0, 0˚
+
+
+
+
a
a
b
b
c
c
(
(
)
)
=
=
2
2
c + a
c + a
>
>
> 0)
> 0)
b
b
x
)
（x）
（x）
x
x
E-58
a
a
03 : S =
03 : S =
'
'
(LOOK)
key to scroll to the right to view
a
b
c
,
, and
.
) and the angle ( ) formed by them
≦ 180˚)
≦ 180˚)
a
,
x
) is known.
0
0
s – a
s – a
s –
s –
(
(
(
(
) (
) (
s
s
b
c
,
) are known.
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