Applying trigonometric ratios along with other mathematical concepts

Find each measurement indicated. Round your answer to the nearest tenth. 1 decimal place

Which would you use to solve for the missing piece?

What rule should you use?

• Sine
• Cosine

Which formula would solve for angle C ?

• a² = c² + b² - 4bc + cosA

• b² = a² + c² - 4ac + cosB

• c² = a² + b² - 4ab + cosC

• c² = a² - b² - 4ac + cosA

Find BC

• A
• B
• C
• D

Solve for "a" if:

A = 70^o, b = 10, and c =4.

• 88.6

• 9.4

• 10.8

• 6

Find angle A

• 53.6
• 13.3
• 113.1

Find AB

• 10

• 8

• 6.1

• 4.9

Would you use the Law of Sines or the Law of Cosines first?

• Law of Sines

• Law of Cosines

Which theorem is used in the following example?
∠B = 30°
∠C = 80°
CA = 8 cm

• SSS
• SAS
• ASA
• AAS