Concept explainers
To solve: the given
Answer to Problem 19WE
The given triangle
Explanation of Solution
Given information:
Give lengths to three significant digits and angle measures to the nearest tenth of a degree.
Calculation:
Summarize the information in a figure.
Since two sides and the included angle are known, the triangle is as an SAS triangle.
Use the law of cosine to find
Substitute 10 for
Take the positive square root on both the sides.
Next, to find the angles.
Let us find angle
Substitute 10 for
Use the inverse sine function to find
The sum of all the angles on a triangle is
Subtract
Therefore, for the given triangle
Chapter 16 Solutions
Algebra and Trigonometry: Structure and Method, Book 2
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