MACHINE SHOP CALCULATION - OD1640 - LESSON 2/TASK 3
EXAMPLE
Multiply 15,, 21' 40" by 3.
d.
To divide an angle by a given number, it is necessary to divide each
column by the number, beginning with the "degrees" column. The remainder in
degrees, if any, must be changed into minutes and added to the "minutes"
column.
The division is then performed on the "minutes" column.
The
remainder in minutes, if any, must be changed into seconds and added to the
"seconds" column.
Finally, the division is performed on the "seconds"
column.
EXAMPLE
Divide 71,, 22' 42" by 3.
Answer:
23,, 47' 34"
5.
Trigonometric Tables
a.
General.
In order to facilitate the solution of trigonometric
problems, tables have been prepared which give numerical values to the sine,
cosine, tangent, and cotangent of angles from 0,, to 90,,.
b.
Use of Tables.
(1) Tables 6 and 7, on the following pages, are an excerpt from the
trigonometric tables listed in Appendix C-4 of FM 43-3.
Notice that the
heading for degrees (that is, 43, 44, 45, and 46) appear both at the top and
at the bottom of each page.
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