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108_Problem CHAPTER 9 - PROBLEM 9.91 CONTINUED Then = 90...

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PROBLEM 9.91 CONTINUED Then 90 40.326 α = ° − ° 49.674 = ° ( ) 180 40.326 60 β = ° − ° + ° 79.674 = ° ( a ) 4 4 ave cos 0.98175 0.77264 cos49.674 x I I R a a α = = ° 4 or 0.482 x I a = W 4 4 ave cos 0.98175 0.77264 cos49.674 y I I R a a α = + = + ° 4 or 1.482 y I a = W 4 sin 0.77264 sin 49.674 x y I R a α ′ ′ = − = − ° 4 or 0.589 x y I a ′ ′ = − W ( b ) 4 4 ave cos 0.98175 0.77264 cos79.674 x
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