chillywhistle chillywhistle

12-07-2019
Mathematics

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Write an equation that could be used to find the value of a.

Write an equation that could be used to find the value of a class=

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sqdancefan sqdancefan

12-07-2019

Answer:

see below

Step-by-step explanation:

The Law of Cosines tells you ...

a² = b² + c² -2bc·cos(A)

Substituting the given values gives you ...

a² = 4² +7² -2(4)(7)cos(52°)

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