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Trigonometric Operations
8
Angular Units
Three decimal-angle units are provided in the HP-46: degrees, radians
and grads. When the calculator is switched on, it automatically calcu-
lates in degrees. To select a different unit, press
mmm
and the
applicable key:
E
N
T4
CHS
E
R
RAD
GRD
DEG
Trig Functions
The following trig functions are available on the HP-46:
SIN
ASN (sin°1)
cOS
ACS (cos™)
TAN
ATN (tan'!)
These functions, as the simple functions, operate on x, whether it is a
newly keyed in number or the result of a previous calculation. To use
the standard trig functions, press the function key. To use the inverse
functions, press first
=mm , and then the appropriate function key.
The calculator uses storage location number 9 to store intermediate
results while calculating trig functions. Any data stored in this location
is erased when using these functions.
EXAMPLES
A. Find the cosine of 33° (If the calculator is not already in degree
units, press
mmm
DEG).
33.00
C
0.84
°
Press:
33
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