COSINE LAW

4. Name the smallest angle in this triangle.

• ∠A

• ∠B

• ∠C

8.Solve for x

• 3.85

• 4.25

• 3.35

• 5.65

What law will you use to solve the oblique triangle at the left?

• Cosine Law

• Sine Law

• Cosine Law and Sine Law

What law will you use to solve the oblique triangle at the left?

• Cosine Law

• Sine Law

• Cosine Law and Sine Law

Which Law would you use to solve for Angle B?

• Law of the Jungle

• Law of Cosines

• Law of the Gravity

• Law of Sines

Which of the following formulas shows the Law of Cosines?

• c² = a² + b² - ab cos C

• c = a² + b² - ab cos C

• c² = a² + b² - 2bc cos C

• c² = a² + b² - 2ab cos C

Which of the following formulas shows the Law of Cosines?

• a² = b² + c² - cos A

• a² = b² + c² - cos B

• a² = b² + c² - 2bc cos A

• a² = b² + c² - 2bc cos B

What is the third angle of a triangle whose 1st angle is 79 and the 2nd angle is 43?

• 43
• 58
• 72
• 101

What are the possible criteria for the Law of Cosines?

• SSA, SSS

• SSA, ASA

• SSS, SAS

• AAS, ASA

What is the distance across the river? The two sides are 4.15 miles and 5.33 miles. The included angle measure is 37 degrees.

• 2.9 miles

• 3.2 miles

• 3.6 miles

• 3.9 miles