Law of Sines and Cosines

Identify the Law of Sines

• Soh Cah Toa

Use the Law of Sines to solve for BC

• 33
• 24
• 12
• 29

Use the Law of Sines to Calculate the length of BC

• 24

• 20

• 27

• 23

Use Law of Sines to find the measure of angle A

• 58 degrees

• 61 degrees

• 78 degrees

• 74 degrees

Use Law of Sines to find X

• 52

• 33

• 41

• 29

Complete the Law of Sines. (Put the 7 on the top left to start)

a

b

c

d

sin 39.4

7

sin 46.5

x

Which Law would you use?

• Law of Sines

• Law of Cosines

For which triangle would you use Law of Sines?

• 
• 
• 
• 

Which law would you use?

• Law of Sines

• Law of Cosines

Which law would you use?

• Law of Sines

• Law of Cosines