caitlinrrovig caitlinrrovig

15-08-2021
Mathematics

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PLEASE HELP (GEO) Find X
Round to the nearest tenth.
20 ft
\22 ft
Y
X 18 ft
X= [?]
Law of Cosines: c2 = a2 + b2 - 2ab cos C

PLEASE HELP GEO Find X Round to the nearest tenth 20 ft 22 ft Y X 18 ft X Law of Cosines c2 a2 b2 2ab cos C class=

Respuesta :

ferrybukantoro ferrybukantoro

15-08-2021

Answer:

70.5°

Step-by-step explanation:

cos x = (20²+18²-22²)/2(20)(18)

= (400+324-484)/720

= 240/720

= 1/3

so, X = arc cos ⅓ = 70.5°

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