Soh-Cah-Toa

A yacht is anchored 90 feet offshore from the base of a lighthouse.  The angle of elevation from the boat to the top of the lighthouse is 26 degrees.  The distance between the yacht and the top of the lighthouse is about 100 feet.  Which of these is nearest to the height of the lighthouse? 

• 25 feet

• 45 feet 

• 110 feet 

• 135 feet 

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

• sine

• cosine

• tangent

• cotangent

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

• sine

• cosine

• tangent

• cotangent

Tangent ratio represent

• Opp/Hyp

• Adj/Hyp

• Opp/Adj

Which ratio would you use to solve for x?

• Sine ratio

• Cosine ratio

• Tangent ratio

Which ratio would you use to solve for x?

• Sine ratio

• Cosine ratio

• Tangent ratio

tan(19˚) = 

• 0.326

• 0.344

• 0.946

Using your calculator, find cos 25° to the nearest hundredth.

• 0.9

• 0.91

• 0.42

• 0.99

Solve for x. Round to the nearest tenth.

• 9.8

• 0.1

• 0.038

• 9.9

Solve for x. Round to the nearest tenth.

• 103.5

• 4.7

• 55.0

• 23.4