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4 years ago

Find B. Round to the nearest tenth!!!!! please help ASAP!!!!!!! trigonometry!!!!!

Mathematics

1 answer:

neonofarm [45]4 years ago

4 0

Answer: 56.0°

<u>Step-by-step explanation:</u>

Use the Law of Cosines:

b² = a² + c² - 2ac · cos B

20² = 22² + 18² - 2(22)(18) · cos B

400 = 484 + 324 - 792 · cos B

400 = 804 - 792 · cos B

-404 = - 792 · cos B

0.5151 = cos B

cos ⁻¹ (0.5151) = B

55.99 = B

56.0 ≈ B

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Find B. Round to the nearest tenth!!!!! please help ASAP!!!!!!! trigonometry!!!!!​

Find B. Round to the nearest tenth!!!!! please help ASAP!!!!!!! trigonometry!!!!!