Law of Sines and Cosine

Identify the Law of Sines

• Sin²x + Cos²x =1

• Sin(A)/a = Sin(B)/b = Sin(C)/c

• Sin(A)Sin(B)Sin(C) = 1

• y=Sin(x)

Amanda and Jamie are standing 25 feet apart and spot a bird in the sky between them. The angle of elevation from Amanda to the bird is 55 degrees, and from Jamie to the bird is 63 degrees. How far away, to 2 decimal places, is the bird from Amanda?

• 25.23 ft

• 23.19 ft

• 22.15 ft

• 20.85 ft

What is the area of this triangle to three decimal places?

• 14.494 meters squared

• 108.184 meters squared

• 54.092 meters squared

• 54.350 meters squared

What are the possible criteria for the Law of Cosines?

• SSA, SSS

• SSA, ASA

• SSS, SAS

• AAS, ASA

Find m<B to the nearest whole number.

• A

• B

• C

• D

Which equation shows how you would use the law of sines to find side c?

Find AB

• 10

• 8

• 6.1

• 4.9

solve the triangle:
A=65 C=65 a=12

• B=50, b=9.9, c=12

• B=50, b=10.1, c=12

• B=70, b=12.8, c=12

• B=40 b=11.2, c=12

Which equation shows how you would use the law of sines to find angle A?