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PROBLEM 2.8
The 50lb force is to be resolved into components along lines

aa
′
and
.
bb
′
(
a
) Using trigonometry, determine the angle
α
knowing that the
component along

′
is 30 lb. (
b
) What is the corresponding value of
the component along
 ?
′
SOLUTION
Using the triangle rule and the Law of Sines
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 Spring '08
 Attia

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