To determine the measures of angles.
Answer to Problem 3P
Angles are
Explanation of Solution
Given information :
A trianglular shaped lot of land has sides 130 m , 150 m, and 80m.
Here we shall use the cosine rule.
Cosine formula states that,
We will apply this three times for all three angles.
Hence we get,
Similarly,
Now angle C is
Chapter 12 Solutions
Algebra and Trigonometry: Structure and Method, Book 2
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