Law of Sines & Cosines & Area

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

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

Find angle A

• 53.6
• 13.3
• 113.1

Find the length of Side BC.

• 33

• 24

• 12

• 29

Find the length of side AB.

• 10

• 8

• 6.1

• 4.9

Find the length of side AC.

• 12

• 10

• 23

• 14

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

• 41.7
• 51.7
• 61.7
• 71.7

Calculate the length of AC

• 30
• 24
• 27
• 35

Solve for "a" if:

A = 30^o, B = 75^o, and b = 4.

• 75

• 4

• 2.1

• 5