HP HP-25 User Manual

formula
to
calculate
the
great
circle
distance
that
Odysseus
must
sail
in
order
to
court
her.
Distance
=
cos™!
[
sin
(LAT,)
sin
(LAT,)
+
cos
(LAT,)
cos
(LATy)
cos
(LNG,
—
LNGy)
]
x
60.
Where LAT,and LNG, = latitude and longitude of the
source (Tristan da Cunha).
LAT,and LNG, = latitude and longitude of the
destination.
Solution: Convert all degrees, minutes, seconds entries into
decimal degrees as you key them in. The equation for the great
circle distance from Tristan da Cunha to the nearest inhabited
land is:
Distance = cos™' [ sin (37°03') sin (15°55") +
cos (37°03") cos (15°55") cos (5°43'W — 12°18'W) ] X 60
Press Display
0 Fx]2
Display mode is set.
(Assumes no results remain
from previous example.)
B
0.00
S(?ts
decima.l
degreg
mode
for
trigonometric
functions.
5.43 @ b 5.72
12.13 AFAE]
0
15.SSEEIRR [ 592 |
7
37.03EEEBER0[ 37.05
@
om
18 G
Il [cos1
60
Distance
in
nautical
miles
that
Odysseus must sail to visit
Penelope.

HP HP-25 Specifications

General

Brand	HP
Model	HP-25
Category	Calculator
Language	English