Law of Sines and Cosines

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

TEKS.MATH.P.4F

TEKS.MATH.P.4G

TEKS.MATH.P.4H

Find the missing side.

• 15.9 in.

• 22.8 in.

• 6.54 in.

• 521.1 in.

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

In triangle ABC, find side a if:

B=70 degrees A=40 degrees and c=11

• 11

• 7.5

• 70

• 8

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Solve triangle ABC if A=40°, B=20°, a=2

• C=120°, b=1.06, c=2.69

• C=120°, b= 2.69, c=1.06

• C= 120°, b=2.68. c=3.26

• C=120°, b=3.26 c=2.68

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11