Introduction to the Law of Cosines

Which law would you use?

• Law of Sines

• Law of Cosines

Which law would you use?

• Law of Sines

• Law of Cosines

Would you use the Law of Sines

or the Law of Cosines?

• Law of Sines

• Law of Cosines

What are the possible criteria for the Law of Cosines?

• SSA, SSS

• SSA, ASA

• SSS, SAS

• AAS, ASA

• 12.7

• 13.1

• 13.6

• 14.2

• 14.5

• 15.1

• 15.8

• 16.7

Would you use the Law of Sines

or the Law of Cosines?

• Law of Sines

• Law of Cosines

Given the triangle: A=50°, b=5, c=2. Find missing length side a

• 3.12

• 4.02

• 14.12

• 28.24