12.
Angle/Time conversions
To convert an angle given as degrees/minutes/seconds to its decimal equivalent, it must
be entered as integer and decimal respectively.
Convert 12°47'52" to its decimal equivalent
Keyin: 12.4752 E°il] 13.
Answer: 12.79777778
When converting decimal degrees to the equivalent degrees/minutes/seconds, the answei
is broken down: integer portion = degrees; 1st and 2nd decimal digits = minutes; 3rd
and 4th digits = seconds; and the 5th through end decimal digits are decimal degrees.
Convert 24.7256 to its degree/minute/second equivalent
Keyin: 24.7256 (2nS H
Answer: 24.433216 or 24°43'32"
A horse has track times of 2 minutes 25 seconds, 2 minutes 38 seconds, and 2 minute!
22 seconds. What is the average running time?
Key in: .0225 ES§ (+ ] .0238 ESj§ EB .0222 Ede§ dO
Answer 1: 0.123611111
Key in: |T1 3. f=1
Answer 2: 0.041203704
Key in: §jij
Answer 3: 0.022833333 or the average time is 2 minutes 28
Coordinate Conversion
[~*r 0 ]
[
re]
____
r = \Jx2 + y 2
8 = tan-1 -j-
-*■xy ]
x - r cos 8
y = r sin 6
coordinate coordinate
Converting rectangular coordinates to polar (x, y
bolve for x = 6 and y = 4 mode = DEG
Key in: 6 [T ] 4 j^rej
Answer: 7.211102551 (r)
Key in. §5] [T ] Answer:
>r ,8)
DEG:
RAD:
GRAD:
33.69006753 (0)
seconds
0 g I 0 I
Q g I 0 I
0< I 0 I
28
29
VII VII VII
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