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In ΔFGH, f = 960 inches, g = 380 inches and h=820 inches. Find the measure of ∠F to the nearest degree.

 Mar 3, 2021
 #1
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Use law of cosines

 

960^2 = 820^2 + 350^2 - 2 ( 850)(350) cos  F     

 

cos F = .2129

 

F = ~  78o

 Mar 3, 2021

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