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Hyperbolic functions and their inverses
Selecting Option 4. HYPERBOLIC.. , in the MTH menu, and pressing @@OK@@,
produces the hyperbolic function menu:
The hyperbolic functions are:
Hyperbolic sine, SINH, and its inverse, ASINH or sinh
-1
Hyperbolic cosine, COSH, and its inverse, ACOSH or cosh
-1
Hyperbolic tangent, TANH, and its inverse, ATANH or tanh
-1
This menu contains also the functions:
EXPM(x) = exp(x) – 1,
LNP1(x) = ln(x+1).
Finally, option 9. MATH, returns the user to the MTH menu.
For example, in ALG mode, the keystroke sequence to calculate, say, tanh(2.5),
is the following:
„´ Select MTH menu
4 @@OK@@ Select the 4. HYPERBOLIC.. menu
5 @@OK@@ Select the 5. TANH function
2.5` Evaluate tanh(2.5)
The screen shows the following output:
In the RPN mode, the keystrokes to perform this calculation are the following:
2.5` Enter the argument in the stack
„´ Select MTH menu
4 @@OK@@ Select the 4. HYPERBOLIC.. menu
5 @@OK@@ Select the 5. TANH function
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