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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
K eyin:
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
K e yin :
24.7256 ( 2 nS 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§ E B .0222 E
de
§ 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 ]
[
r e ]
____
r = \ J x 2 + 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
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