E-18
k
Trigonometric/Inverse Trigonometric
Functions
• To change the default angle unit (degrees, radians,
grads), press the
F
key a number of times until you
reach the angle unit setup screen shown below.
1 2 3
Deg Rad G r a
• Press the number key (
1
,
2
, or
3
) that corresponds
to the angle unit you want to use.
(90
°
=
radians = 100 grads)
•
Example 1:
sin 63
°
52
41
0.897859012
q
.....
1
(Deg)
S
63
I
52
I
41
I
=
π
2
•
Example 3 :
cos
1
q
.....
2
(Rad)
A
V
R
L
2
\
2
T
=
g
\
A
x
=
0.25
π (
rad)
(
(rad)
)
π
4
2
2
•
Example 2:
cos
(
rad
)
0.5
q
.....
2
(Rad)
W
R
A
x
\
3
T
=
π
3
•
Example 4:
tan
1
0.741
36.53844577
°
q
.....
1
(Deg)
A
g
0.741
=
k
Hyperbolic/Inverse Hyperbolic
Functions
•
Example 1:
sinh 3.6
18.28545536
M
S
3.6
=
•
Example 2:
sinh
1
30
4.094622224
M
A
j
30
=
