Answered

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Use the Law of Cosines to solve for the side BC. Round your answer to the point
nearest whole number. Write the value only *

Use The Law Of Cosines To Solve For The Side BC Round Your Answer To The Point Nearest Whole Number Write The Value Only class=

Sagot :

763396

Answer:

BC = 50

Step-by-step explanation:

Law of Cosines:

c^2 = a^2 + b^2 - 2ab*cosy (c is BC)

c^2 = 30^2 + 21^2 - 2(30)(21)cos123

c^2 = 900 + 441 - 1260*(-0.888)

c^2 = 1341 - (-1118.841)

c^2 = 2459.841

c = 49.597

c = 50

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