MACHINE SHOP CALCULATION - OD1640 - LESSON 2/TASK 3
According to Rule (5)(see page 53), the side opposite = hypotenuse x sine.
Therefore:
Side A
= 10 inches x .5 (sine of the
(the side
30,, angle)
opposite the
30,, angle)
= 5 inches (or 1/2 the length of
the hypotenuse)
FIGURE 24.
RELATIONSHIP BETWEEN 30,, AND 60,, ANGLES.
(2) In figure 24, A is the side opposite the 30,, angle, C is the
hypotenuse, and B is the adjacent side. Sine 60,, equals .866 (Table 11 on
the following page); and since sine 60,, = side opposite + hypotenuse = B/C,
then B/C = .866.
Therefore, B = .866 x C, the hypotenuse.
Thus, the
following relationship is derived:
side opposite 60,, angle = .866 x
hypotenuse.
75
Previous Page
