SECTION 7.3

Question 1

When do you use the Law of Cosines?

Answer 1

in SSS and SAS

Question 2

What is the formula for the Law of Cosines?

Answer 2

a² = b² + c² - 2bc*cosA

Question 3

When do you use the Law of Sines?

Answer 3

in SAA and SSA

Question 4

What is the formula for the Law of Sines?

Answer 4

sinA/a = sinB/b = sinC/c

Question 5

In which kind of triangle is there potential for multiple solutions?

Answer 5

SSA

Question 6

How do you figure out the number of solutions for a triangle with an obtuse angle?

Answer 6

1. When opposite < adjacent, there are no solutions.
2. When opposite > adjacent, there is one solution.

Question 7

How do you figure out the number of solutions for a triangle with an acute angle?

Answer 7

1. When opposite < height < adjacent, there are no solutions.
2. When opposite = height < adjacent, there is one solution (right triangle).
3. When height < opposite < adjacent, there are two solutions.
4. When opposite >/= adjacent, there is one solution.