03 : s, S– a, S – 03 : s – Casio fx-50F PLUS User Manual
Page 59: Built-in formula list
E-58
A Displaying a Built-in Formula
While inputting values for the variables of a formula, you can display the formula by pressing
1G(LOOK).
(Value Input Screen)
1G(LOOK)
• If the formula is too long to fi t on the display use the
e key to scroll to the right to view
the missing part.
• To clear the formula from the display, press
1p(EXIT) or A.
k
Built-in Formula List
No. 01
Quadratic Equation Solution
Solves a quadratic equation using values you specify for
a
,
b
, and
c
.
No. 02
Cosine Theorem
For a triangle for which the lengths of two sides (
b
and
c
) and the angle (
Ƨ
) formed by them
are known, determines the length of remaining side.
No. 03
Heron’s Formula
Determines the area (
S
) of a triangle when the lengths of its three sides (
a
,
b
,
c
) are known.
No. 04
Normal Probability Function P(
x
)
Uses Hastings’ estimate formula to determine the probability of a standard normal
distribution P(
x
) illustrated below when the standardized variate (
x
) is known.
Important!
Since this is an estimate formula, proper precision may not be obtainable.
0
a
0
a
03 : S=
'
(
s
(
s– a
) (
s –
03 : S=
'
(
s
(
s– a
) (
s –
ax
2
+
bx
+
c
= 0
(
a
≠ 0,
b
2
− 4
ac
0)
ax
2
+
bx
+
c
= 0
(
a
≠ 0,
b
2
− 4
ac
0)
a
=
b
2
+
c
2
− 2
bc
cos
θ
(
b
,
c
>
0, 0˚
<
180˚)
θ
a
=
b
2
+
c
2
− 2
bc
cos
θ
(
b
,
c
>
0, 0˚
<
180˚)
θ
S
=
s
(
s
−
a
)(
s
−
b
)(
s
−
c
) ,
s
=
(
a
+
b
+
c
)
(
a
+
b
>
c
> 0,
b
+
c
>
a
> 0,
c
+
a
>
b
> 0)
2
S
=
s
(
s
−
a
)(
s
−
b
)(
s
−
c
) ,
s
=
(
a
+
b
+
c
)
(
a
+
b
>
c
> 0,
b
+
c
>
a
> 0,
c
+
a
>
b
> 0)
2
P
(
x
)
=
e
dt
(0
x
<
1
×
10
50
)
2
π
1
−
∞
∫
x
2
2
t
−
P x
x
P
(
x
)
=
e
dt
(0
x
<
1
×
10
50
)
2
π
1
−
∞
∫
x
2
2
t
−
P x
x