PROBLEM 2.9
To steady a sign as it is being lowered, two cables are attached to the sign
at
A
. Using trigonometry and knowing that
α
=
25
°
, determine (
a
) the
required magnitude of the force
P
if the resultant
R
of the two forces
applied at
A
is to be vertical, (
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 Spring '08
 Attia
 Law Of Cosines, Law of sines, triangle rule, corresponding magnitude, required magnitude

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