Real–Number Functions 4–5
File name 32sii-Manual-E-0424
Printed Date : 2003/4/24 Size : 17.7 x 25.2 cm
Programming Note:
Equations using inverse trigonometric functions to determine an angle
θ
, often
look something like this:
θ
= arctan (y
/
x).
If x = 0, then y
/
x is undefined, resulting in the error:
#
&
. For a
program, then, it would be more reliable to determine
θ
by a rectangular– to
polar conversion, which converts (x,y) to (r,
θ
). See "Coordinate Conversions"
later in this chapter.
Hyperbolic Functions
With x in the display:
To Calculate Press:
Hyperbolic sine of x (SINH).
z
7
N
Hyperbolic cosine of x (COSH).
z
7
Q
Hyperbolic tangent of x (TANH).
z
7
T
Hyperbolic arc sine of x (ASINH).
z
7
z
L
Hyperbolic arc cosine of x (ACOSH).
z
7
z
O
Hyperbolic arc tangent of x (ATANH).
z
7
z
R
Percentage Functions
The percentage functions are special (compared with
y
and
p
) because
they preserve the value of the base number (in the Y–register) when they
return the result of the percentage calculation (in the X–register). You can then
carry out subsequent calculations using both the base number and the result
without reentering the base number.
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