Finding Sides Using Trigonometry

Which trig ratio would you use for the following?

• Sin

• Cos

• Tan

• You would not be able to use trigonometry

What is the first step when using trigonometry?

• Work out which ratio to use.

• Enter values into the calculator.

• Label the sides.

• Panic and skip to the next question.

Solve for the misssing distance

• 18.9

• 19.5

• 47

• 27.5

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 

Find the measure of the indicated angle (?) round to the nearest tenth.

• 33°

• 49°

• 39°

• 41°

Solve for the misssing distance

• 18.9

• 19.5

• 47

• 27.5

A building 62 meters tall casts a shadow 21 meters long.  What is the angle of elevation of the sun?

• 19.80

• 18.71

• 70.20

• 71.29

What is the helicopter's altitude?

• 351 ft

• 674 ft

• 751 ft

• 274 ft

What is the length of the cable?

• 92.4 ft

• 69.3 ft

• 89.3 ft

• 46.2 ft

We can use SOH-CAH-TOA for...

• Any triangle ever

• Non-right triangles only

• Right Triangles only

• Never