Casio ClassPad 330 - Page 131

20060301
k
Hyperbolic Functions (sinh, cosh, tanh) and Inverse Hyperbolic Functions
(sinh
–1
, cosh
–1
, tanh
–1
)
Problem
Use this keyboard:
Operation
mth abc cat 2D
sinh3.6 = 18.28545536 TRIG Func
=
1
3.6
w
cosh1.5 – sinh1.5
= 0.2231301601
TRIG Func
=
2
1.5
)-
1
1.5
w
e
–1.5
= 0.2231301601*

MATH Func

e -
1.5
w
cosh
–1
(
20
15
)
= 0.7953654612
TRIG Func
=
@
20
/
15
w
or
=
@)N
20
c
15
w
Solve for
x
given
tanh(4
x
) = 0.88.
= 0.3439419141
TRIG Func
=
#
0.88
)/
4
w
or
)
N
9
=
#
0.88
)
c
4
w
* This problem checks whether cosh
x

sinh
x
=
e

x
. Solving the problem above this one
(cosh1.5 – sinh1.5) and comparing it with this problem’s solution shows that they are equal.
2-4-4
Function Calculations
x
=
tanh
–1
0.88
4