To explain:
law of cosine used for solving ambiguous case of given oblique triangle along with their advantages and disadvantages.
Answer to Problem 63E
law of cosine is used for solving given triangle
Explanation of Solution
Given information:
Where,
It is given that,
By the law of cosine,
Putting the values,
Thus,
Set of values given there are two triangles.
Thus there will be two values of angles
By using law o f sine would give a same result as sine is positive for angles
Advantages of using law of cosine:
Easier to choose the correct value to avoid ambiguous case.
Disadvantage of using law of cosine:
Computations and calculations are more.
Advantages of using law of sine:
Computations and calculations are less.
Disadvantages of using law of sine:
Not so easy to select the correct value and hence the chance of ambiguity is more.
Chapter 6 Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
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