MACHINE SHOP CALCULATION - OD1640 - LESSON 2/TASK 3
TABLE 11.
TRIGONOMETRIC TABLES.
EXAMPLE
In figure 24, on the previous page, let side C = 10 inches and side B = 8.66
inches. According to Rule (1)(see page 53),
According to Rule (5)(see page 53), the side opposite = hypotenuse x sine.
Therefore:
side B
=
10 inches
x
.866
(the side
(length of
(sine of the
opposite the
side C, the
60,, angle)
60,, angle)
= 8.66 inches
10.
The cutting of regular polygons, such as hexagons and squares, is common
practice in shop work. The constants just discussed are put to use here.
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