The rest of the question is as following
m<B=70, and c=9 in. Which information about the triangle is given.
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Solution:
Given the following:
a = 11 in , ∠B = 70° , c = 9 in
The given information can be used in the cosine law.
Which is ⇒⇒⇒ b² = a² + c² - 2 a c * cos (B)
The correct answer is the third option.
