desirekot desirekot
  • 02-03-2019
  • Mathematics
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Use the law of cosines to find the balue of cos 0 . Round to answer to two decimal places

Use the law of cosines to find the balue of cos 0 Round to answer to two decimal places class=

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jimrgrant1 jimrgrant1
  • 02-03-2019

Answer:

C

Step-by-step explanation:

Using the law of cosines then cosΘ is the following quotient

cosΘ = [tex]\frac{a^2+b^2-c^2}{2ab}[/tex]

where a = 5.8, b = 10.5 and c = 10.9

cosΘ = [tex]\frac{5.8^2+10.5^2-10.9^2}{2(5.8)(10.5)}[/tex]

        = [tex]\frac{33.64+110.25-118.81}{121.8}[/tex]

        = [tex]\frac{25.08}{121.8}[/tex] = 0.21 → C

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