jjsmoh2 jjsmoh2

02-02-2021
Mathematics

contestada

PLEASE HELP ASAP I WILL GIVE BRAINLIEST!!!
Find the value of x.
Round to the nearest tenth.
х
3
120°
10
x = [?]
Law of Cosines: c2 = a2 + b2 - 2ab cos C
Enter

PLEASE HELP ASAP I WILL GIVE BRAINLIEST Find the value of x Round to the nearest tenth х 3 120 10 x Law of Cosines c2 a2 b2 2ab cos C Enter class=

Respuesta :

clarch19 clarch19

03-02-2021

Answer:

x = 11.8

Step-by-step explanation:

x² = 3² + 10² - 2(3)(10) · cos120°

x² = 109 - (60 · cos120°)

x² = 109 - (-30)

x² = 139

x = [tex]\sqrt{139}[/tex] ≈ 11.8

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