Sine, Cosine, Tangent and Law of Sines

Choose the correct ratio.

• cos(57)=x/20

• sin(57)=x/20

• cos(57)=20/x

• sin(57)=20/x

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 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?

• Law of Sines

• Law of Cosines

• Law of the Jungle

• Law of Gravity

Which Law would you use to solve for Angle B?

• Law of the Jungle

• Law of Cosines

• Law of the Gravity

• Law of Sines

Which Law would you use?

• Law of Sines

• Law of Cosines

• Law of the Jungle

• Law of Gravity

If you are given the two sides that are not the hypotenuse, which trig function should you use?

• sine

• cosine

• tangent

If you are given the opposite side and hypotenuse, which trig function should you use?

• sine

• cosine

• tangent

If you are given the hypotenuse and an adjacent side, which trig function should you use?

• sine

• cosine

• tangent

Solve for x.

• 24.20

• 4.92

• 290.4

• 29.75