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

Question

asked Dec 2, 2020 99.3k views

1 Answer

Gowtham K K · Answer 1 · 2020-12-09T06:59:50+0000

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°)