#9.7 Law of Sines and Law of Cosines

Use a calculator to find $\cos115\degree$  

•  $-0.4226$  

•  $0.9063$  

•  $-2.1445$  

• Undefined

Use a calculator to find $\tan95\degree$  

•  $0.9962$  

•  $-0.0872$  

•  $-11.4301$  

• Undefined

Use a calculator to find $\sin148\degree$  

•  $-0.8480$  

•  $0.5299$  

•  $-0.6249$  

• Undefined

Find the area of the triangle.

• $18.6\ m^2$

• $22.8\ m^2$

• $48.9\ m^2$

• $54\ m^2$

Find the area of the triangle.

• $132.6\ m^2$

• $287.8\ m^2$

• $203.5\ m^2$

• $143.9\ m^2$

For which case are you NOT able to use the Law of Sines?

• AAA

• AAS

• ASA

• SSA

Use the Law of Sines to find  $BC$  

• 5.9

• 6.7

• 4.8

• 7.1

Use the Law of Cosines to find $m\angle A$  

•  $78.6\degree$  

•  $60.6\degree$  

•  $40.8\degree$  

•  $52.8\degree$  

Use the Law of Sines to find  $m\angle B$ 

• $28.9\degree$
  

• $72.7\degree$
  

• $60.1\degree$
  

• $36.9\degree$
  

Use the Law of Cosines to find $AC$  

•  $17.3$  

•  $13.6$  

•  $12.4$  

•  $16.2$