Trigonometric ratios, Law of Sines and Law of Cosines

Find the length of Side BC.

• 33

• 24

• 12

• 29

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

Find the length of side AC.

• 12

• 10

• 23

• 14

What is the measure of angle A?

• 50 degrees
• 60 degrees
• 78 degrees
• 74 degrees

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

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

In ΔQRS, q = 1.3 cm, r = 7.6 cm and s=7 cm. Find the measure of ∠Q to the nearest 10th of a degree.

• 9.2

• 9.1

• 8.9

• 91