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91_Problem CHAPTER 9 - PROBLEM 9.79 CONTINUED(a = 45 I x =...

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PROBLEM 9.79 CONTINUED ( a ) 4 4 4 5 3 1 45 : cos90 sin90 16 16 2 x I a a a θ π π = + ° = ° − ° 4 or 0.482 x I a = W 4 4 5 3 1 cos90 16 16 2 y I a a π π = + ° + 4 or 1.482 y I a = W 4 4 3 1 sin90 cos90 16 2 x y I a a π ′ ′ = − ° + ° 4 or 0.589 x y I a ′ ′ = − W ( b ) 30 : θ = − ° ( ) ( ) 4 4 4 5 3 1 cos 60 sin 60 16 16 2 x I a a a π π = ° ° 4 or 1.120 x I a = W ( ) ( ) 4 4 4 5 3 1 cos 60 sin 60 16
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