Alg2_11.13.23_Trig Functions/Law of Sines/Law of Cosines

Let (-4, 3) be a point on the terminal side of θ.  Which of the following is FALSE?

• cos θ = -4/5
• tan θ = -3/4
• sin θ = 3/5
• cos θ = 4/5

• a
• b
• c
• d

If sinθ = -5/13 and tanθ > 0, then cosθ =

• 13/12
• -13/12
• 12/13
• -12/13

Find the length of side AB. m<C = 53 degrees. m<B = 44 degrees. AC = 7.

• 8.0

• 8.8

• 9.2

• 10.3

Which Law would you use to find side length BC?

• Law of Sines

• Law of Cosines

• Law of the Jungle

• SOHCAHTOA

Which Law would you use to solve for Angle B?

• SOHCAHTOA

• Law of Cosines

• Laws of the Masked Singer

• Law of Sines

What is the measure of angle A? BC = 37 cm, AB = 29 cm and m<C = 50 degrees.

• 70.7 degrees

• 74.5 degrees

• 77.8 degrees

• 80.2 degrees

Which of the following formulas shows the Law of Cosines?

• c² = a² + b² - 4ac + cosA
• c² = a² - b² - 2abcosC
• c² = a² + b² - 2abcosC
• (cos A)/a = (cos B)/b

Which Law would you use to solve for side AC?

• Law of Sines

• Law of Cosines

• Newton's Laws

• SOHCAHTOA

What is the distance across the river? The two sides are 4.15 miles and 5.33 miles. The included angle measure is 37 degrees.

• 2.9 miles

• 3.2 miles

• 3.6 miles

• 3.9 miles