HP 39g hp 39g+ (39g & 40g)_mastering the hp 39g+_English_E_F2224-90010.pdf - Page 259
The ‘Tests’ group, The ‘Trig’ & ‘Hyperbolic’ groups, COT, SEC etc - plus calculator
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The 'Tests' group of functions These are all functions which are of interest only to programmers, and consequently we will not cover them here. An introduction to programming on the hp 39g+ is covered in an earlier chapter (see page 212) but those wanting more detail than is given there must consult the manual. If you want more information then download aplets from the internet and dismantle them. The 'Trigonometric' & 'Hyperbolic' groups of functions 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 COT (cotangent) CSC (cosec/cosecant) SEC (secant) Inverse function ACOT (arc-cotangent) ACSC (arc-cosec) ASEC (arc-secant) In the Hyperb. group of functions you will find (amongst other things): Function SINH (hyperbolic sine or "shine") COSH (hyperbolic cos or "cosh") TANH (hyperbolic tan) Inverse function ASINH (arc-hyp.sine) ACOSH (arc-hyp.cos) ATANH (arc-hyp.tan) 259