Quiz 6.2 - Law of Cosines

Which of the following formulas shows the Law of Cosines?

• c² = a² + b² - 4ac + cosA
• c² = a² - b² - 2abcosC
• c² = a² + b² - 2abcosC
• (cos A)/a = (cos B)/b

If three sides of a triangle are given, the Law of ____ is used to solve the triangle.

• Cosines
• Sines
• Tangent
• Cosecents

Find angle Z

• 20.15°

• 71.23°

• 51.06°

• 57.71°

• 11.6

• 4.1

• 7.0

• 13.8

8.Solve for x

• 3.85

• 4.25

• 3.35

• 5.65