Mini assessment: Law of sin/cos

Use the Law of Cosines to find angle Z

• 20.15°

• 71.23°

• 51.06°

• 57.71°

Use the Law of Cosines to find side a (BC)

• A

• B

• C

• D

Choose which law you need to solve the problem (DO NOT SOLVE):

• Law of Sines

• Law of Cosines

• Both

• Neither

Use the Law of Sines to find side c. (AB)

• 10

• 8

• 6.1

• 4.9

Use the ambiguous case of Law of Sines (SSA) to find both measures for angle A.

Solve the Triangle(s): A = 26^o, a = 5, b = 9

• no triangle possible

• B = 14^o, C = 21^o, c = 8.7

• B = 52^o, C = 102^o, c = 11.2

• B = 52^o , C = 102^o, c = 11.2

  OR

  B = 128^o, C = 26^o, c = 5.0

• Not a triangle

Which law would you use?

• Law of Sines

• Law of Cosines

Find m<A to the nearest whole degree. (just type the number with no degree sign)

(a)  

Use the Law of Sines to find side a (BC).

• A

• B

• C

• D