Laws of Sign and Cosine

Find the missing side.

• 15.9 in.

• 22.8 in.

• 19.2 in.

• 521.1 in.

Which law would you use?

• Law of Sines

• Law of Cosines

Which law would you use?

• Law of Sines

• Law of Cosines

• 12.7

• 13.1

• 13.6

• 14.2

Which law would you use?

• Law of Sines

• Law of Cosines

Which Law would you use?

• Law of Sines

• Law of Cosines

• 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

Solve the triangle

• b=2.95 , A=28.7 , C=106.3

• b= 2.95, A= 30.6, C=108.43

• b=0.67 , A=28.7 , C=105.78

• b=4.95 , A= 21, C=106

What are the possible criteria for the Law of Cosines?

• SSA, SSS

• SSA, ASA

• SSS, SAS

• AAS, ASA