LT 7.4 Law of Sines and Cosines

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 Law would you use?

• Law of Sines
• Law of Cosines
• Law of the Jungle
• Law of Gravity

Which Law would you use?

• Law of Sines
• Law of Cosines
• Law of the Jungle
• Law of Gravity

Identify the Law of Sines

• Sin²x + Cos²x =1

• a/sinA = b/sinB = c/sinC

• Sin(A)Sin(B)Sin(C) = 1

• Soh-Cah-Toa

Use the law of sines to find the length of Side BC.

• 33

• 24

• 12

• 29

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

Use the Law of Cosines to find the value of x.  (Level 1)

• 41.7
• 51.7
• 61.7
• 71.7

Use Law of Cosines to find XZ

• 16.004 meters
• 544.165 meters
• 34.7 meters
• 1204.165 meters

Find the length of side AB.

• 10

• 8

• 6.1

• 4.9

What is the measure of angle A?

• 58 degrees
• 61 degrees
• 78 degrees
• 74 degrees