HP 39gs_40gs_Mastering The Graphing Calculator_English_E_F2224-90010

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These are all functions which are of interest only to programmers, and consequently we will not cover them
here. For anyone who has done any programming their use is obvious. They can also be found, far more
conveniently, in the
CHARS view.
A fairly thorough introduction to programming on the calculator is given in an later chapter (see page 255).
Those wanting more detail than is given there must consult the manual. One way to learn more about
programming is to download aplets from the internet and dismantle them to see how the code produces the
results.
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These two groups of functions cover the Trigonometry functions, plus others, which are less commonly used
and which have consequently not been given their own keys on the face of the calculator. Use them in the
same way as the normal
SIN, COS and TAN functions.
COT, SEC etc
In the Trig. group of functions you will find:
Function Inverse function
COT (cotangent)
CSC (cosec/cosecant)
SEC (secant)
ACOT (arc-cotangent)
ACSC (arc-cosec)
ASEC (arc-secant)
In the Hyperb. group of functions you will find (amongst other things):
Function Inverse function
SINH (hyperbolic sine or “shine”) ASINH (arc-hyp.sine)
COSH (hyperbolic cos or “cosh”) ACOSH (arc-hyp.cos)
TANH (hyperbolic tan) ATANH (arc-hyp.tan)
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