Law of Sines and Cosines PreAP

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.11

CCSS.HSG.SRT.D.10

Find angle Z

• 18.77°

• 71.23°

• 51.06°

• 57.71°

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

• Cosines

• Sines

• Tangents

• Cosecants

Which Law would you use?

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

Tags

CCSS.HSG.SRT.D.11

CCSS.HSG.SRT.D.10

Find the missing side.

• 15.9 in.

• 22.8 in.

• 6.54 in.

• 521.1 in.

Calculate the length of AC

• 32.68 ft

• 110.70 ft

• 27.54 ft

• 26.58 ft

4. Name the smallest angle in this triangle.

• Angle A

• Angle B

• Angle C

Which Law would you use to solve for Angle B?

• Law of the Jungle

• Law of Cosines

• Law of the Gravity

• Law of Sines

Based on the given information determine the number of unique triangles that may exist.
J = 98°, j = 29, p = 6

• 1 Triangle
• 2 Triangles
• No Triangles
• 3 Triangles

Tags

CCSS.HSG.CO.C.10

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Based on the given information determine the number of unique triangles that may exist.
A= 37°, a=8, b=14

• 1 Triangle
• 2 Triangles
• No Triangles
• 3 Triangles

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11