Casio ClassPad 300 - Manual (Page 111)

20021201
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 TRIG Func =2 1.5 )-11.5
= 0.2231301601 w
e –1.5 = 0.2231301601*
ࠗ
MATH Func
ࠗ e - 1.5 w
cosh –1 (
20
)
TRIG Func =@ 20 / 15 w or
15 =@)N 20 c
= 0.7953654612 15 w
Solve for x given TRIG Func =# 0.88 )/ 4 w or
tanh(4 x ) = 0.88.
)N9=#
0.88 )
c 4 w
=0.3439419141
* 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