Chapter 6.2, Problem 60E

a.

To determine

To explain:

Law of sine or law of cosine used for solving given triangle.

Answer to Problem 60E

law of cosine is used for solving given triangle

Explanation of Solution

Given information:

  

Here in the given diagram three side length are given so in this case for solving triangle law of cosine is used,

Initially choose the angle to start with, then to find measure of angle given the side length, and then repeat the procedure to find out the Second angle of the triangle.

Then measure of third angle by subtracting the first two angles from $180$ , or use the law of cosine and the given side lengths to find the third angle or use the law of sines and measure one o f the first two angles.

b.

To determine

To explain:

Law of sine or law of cosine used for solving given triangle.

Answer to Problem 60E

law of sine is used for solving given triangle

Explanation of Solution

Given information:

  

Here in the given case is ASA souse law of sines.

For solving triangle make use of law of sine formulas as below,

  $\frac{a}{\sin A}=\frac{b}{\sin B}=\frac{c}{\sin C}$