Law of Sines and Cosines Practice

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

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Find angle Z

• 18.77°

• 71.23°

• 51.06°

• 57.71°

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

If three sides of a triangle are given, the Law of ____ is used to solve the triangle.

• Cosines

• Sines

• Tangents

• Cosecants

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Which Law would you use?

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

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Calculate the length of AC

• 32.68 ft

• 110.70 ft

• 27.54 ft

• 26.58 ft

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

4. Name the smallest angle in this triangle.

• Angle A

• Angle B

• Angle C

Tags

CCSS.HSG.CO.C.10

Which Law would you use to solve for Angle B?

• Law of the Jungle

• Law of Cosines

• Law of the Gravity

• Law of Sines

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Solve for angle B if:

a = 4, b = 5, and c = 8.

• 59.2^o

• 125.1^o

• 30.8^o

• 24.1^o

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

• Angle of elevation

• Angle of depression

Tags

CCSS.HSG.SRT.C.8

• Angle of elevation

• Angle of depression

Tags

CCSS.HSG.SRT.C.8