Introduction to Trigonometry and Law of Sines and Cosines

Given: B = 70°, a = 11, C = 40° Find: c

• 11
• 7.5
• 70
• 8

A=122° c=22 a=31 find B

• 37
• 21
• 13.1
• 49

Given: A = 45°, B = 65°, c = 25 Find: a

• 19
• 24.1
• 70
• 18.8

Solve the Triangle
B= 85°, C= 47°, and a=19
Find A, b, and c

• A= 48°, b=25.5, c= 17.8
• A= 48°, b= 19.5, c= 23.4
• A= 90°, b= 14, c= 23.6
• A= 39°, b= 19, c= 19√2

Solve the Triangle
a=38, b= 31, c= 35
Find A, B and C

• A= 43°, B= 47°, C= 90°
• A= 70°, B= 50.1°, C= 59.9°
• A= 50.1°, B= 70°, C= 59.9°
• A= 60°, B= 70°, C= 50°

A triangle has side lengths of 3, 8, and 9.  Find the angle measurement for the angle across from the side with length of 8.

• 19^o
• 80^o
• 61^o
• 53^o

Angle C is 41^o, side AC is 13 and side CB is 29.  Find side AB.

• 18.5
• 32
• 30
• 21

Which Law would you use?

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

Which Law would you use?

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

Which Law would you use?

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