Law of Cosines Formula

Use Law of Cosines to find angle T

• 62.2°

• 53.1°

• 59.5°

• 64.7°

Find angle Z

• 20.15°

• 71.23°

• 51.06°

• 57.71°

Find the missing side.

• 15.9 in.

• 22.8 in.

• 19.2 in.

• 521.1 in.

8.Solve for x

• 3.85

• 4.25

• 3.35

• 5.65

Find the area of the triangle

• 72 meters squared

• 8.8 meters squared

• 18.09 meters squared

• 70.2 meters squared

Calculate the area of Triangle ABC if b=32, c=27 and angle A = 108 degrees

• 400sq units

• 411sq units

• 345sq units

• 525sq units

Two stakes are holding a small blimp in place. Stake A measures an angle of elevation of 49^o and Stake B measures an angle of elevation of 58^o. If the blimp is 148.3 feet from stake A, what is the total length of rope between stake A, the blimp, and stake B?

• 253 feet

• 166 feet

• 280 feet

• 132 feet

Use Law of Cosines to find XZ.

• 16.004 meters

• 544.165 meters

• 34.7 meters

• 1204.165 meters

Which Law would you use?

• Law of Sines

• Law of Cosines

• Law of the Jungle

• Law of Gravity

Find angle A if
B=19
a=51
c=61

• 21

• 108.7

• 52.4

• 51