Find X.
Round to the nearest tenth.
Law of Cosines : c2 = 22 + b2 - 2ab cos C
1 answer:
Answer:
70.5°
Step-by-step explanation:
22² = (20)²+(18)² - 2(20)(18) cos X
484 = 400 + 324 - 720 cos X
-240 = -720 cosx
1/3 = cos X
= X
X = 70.52877937
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