Precalculus Trigonometry Functions

Find the arc length. Leave your answer in terms of π.

Alison is jogging on a circular track that has a radius of 140 feet. She runs along the track from point R to point N, a distance of 230 feet. Find to the nearest degree, the measure of minor arc RN.

• 47

• 94

• 123

• 74

Rob is trying to open a can. He wants to find the arc length the can opener needs to travel to open the can half way. The radius of the can is 1.5 inches.

• 10 inches

• 4.7 inches

• 2 feet

• 3.53 inches

One side of an equilateral triangle is 4 cm. The area of the triangle is _______

• 16 √3 cm²

• 8 √3 cm²

• 4 √3 cm²

• √3 cm²

The area of ΔABC in which AB = AC = 4 cm and ∠A = 90° is ________

(Hint: draw it out.)

• 8 cm²

• 10 cm²

• 16 cm²

• 32 cm²

If the sides of a triangle are 3, 4, and 5, what is the area?

• 6

• 12

• 6.28

• 3.14159

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