To solve: Triangle
Answer to Problem 12E
Explanation of Solution
Given information: Triangle
Calculation:
Use the law of cosines formula with the angle isolated to find the angle C.
You know which angle you are solving for because its corresponding side length is being subtracted in the numerator.
Simplify
Solve for C. if your answer doesn’t match make sure your calculator is set in degrees.
Use the law of sines formula to solve for angle A
Solve for A
Add A and C together, then subtract their sum from 180 degrees (the sum of interior angles of a triangle) to solve for B
Solve for B
Thus,
Chapter 5 Solutions
Advanced Mathematical Concepts: Precalculus with Applications, Student Edition
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