Trigonometric Ratios

Select the correct ratio for TanC

Select the correct ratio for CosC

When working with Trig ratios, Law of Sines, or Law of Cosines the calculator should be in what mode?

• Radian

• Classic

• Degree

• Triangle

Which Law would you use?

• Law of Sines, but use inverse to find angle measure

• Law of Cosines, but use inverse to find angle measure

• Law of the Jungle, and watch out for the poison dart frog

• Law of Gravity, and watch out for the apples falling from the tree

Which Law would you use?

• Law of Sines

• Law of Cosines

• Law of the Jungle

• Law of Gravity

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 

• 14/48

• .96

• .28

• 48/14

Find the measurement of the missing side indicated

• 4.39

• 3.21

• 2.19

• 2.05

• 9/41
• 40/41
• 9/40
• 3/10

Find the length of side w.

• 21.4 cm

• 18.0 cm

• 36.5 cm

• 43.6 cm