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27 August, 12:32

If a = 150 inches, b = 50 inches, and C = 120º find c.

Round to the nearest tenth of an inch.

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Answers (2)
  1. 27 August, 12:53
    0
    180.3 inches

    Step-by-step explanation:

    Using cosine law:

    c² = 150² + 50² - 1 (150) (50) cos (120)

    c² = 32500

    c = 50sqrt (13)

    c = 180.3 (nearest tenth)
  2. 27 August, 14:19
    0
    Answer:180.3

    Step-by-step explanation:

    a=150

    b=50

    C=120

    c^2=a^2+b^2-2 x a x b x cosC

    c^2=150^2+50^2-2x150x50xcos120

    c^2=150x150+50x50-2x150x50xcos120

    c^2=22500+2500-15000cos120

    c^2=25000-15000x-0.5

    c^2=25000+7500

    c^2=32500

    c=√ (32500)

    c=180.3
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