Law of Sines Precalculus

Identify the Law of Sines

• Sin²x + Cos²x =1
• Sin(A)/a = Sin(B)/b = Sin(C)/c
• Sin(A)Sin(B)Sin(C) = 1
• Soh-Cah-Toa

Which Law would you use?

• Law of Sines
• Law of Cosines
• Law of the Jungle
• Law of Gravity

Find AB.

• A
• B
• C
• D

Find BC.

• A
• B
• C
• D

Find BC

• A
• B
• C
• D

Find AC

• 12
• 10
• 23
• 14

What is the measure of angle A?

• 50 degrees
• 60 degrees
• 78 degrees
• 74 degrees

Find x, the measure of the angle.

• 52
• 33
• 41
• 29

find X

• 52

• 33

• 41

• 29

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