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

asked Dec 2, 2020 99.3k views

5 votes

by Fassl

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4 votes

Answer:

see below

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°)

Gowtham K K answered Dec 9, 2020

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