Find the Missing Side and Angle Using Trigonometry

Find the length of side w.

• 21.4 cm

• 18.0 cm

• 36.5 cm

• 43.6 cm

 Find side AB?

• 20 m

• 5 m

• 11.54 m

• 8.66 m

What equation can be used to solve for x?

• Sin(40°)= x/40 

• Sin(40º)=x/19

• Cos(40º)=x/19

• Tan(40°)=19/x

Which trig ratio would you use for the following?

• Sin

• Cos

• Tan

• You would not be able to use trigonometry

Use the Trig Toolkit to find the value of x in the given diagram. Click and drag your answer into the blank space below.

The value of x is (a)   .

• 21

• 33

• 12

Use the Trig Toolkit to find the missing side length, y. Choose your answer from the dropdown menu below.

ANSWER: ​ (a)  

• y = 20

• y = 70

• y = 50

What is the value of y?

Mathematical Equivalence

ON

Find the length of the missing side. Round your answer to the nearest 10th.

Mathematical Equivalence

OFF

What is the correct equation?

​ (a)   = ​ (b)   /​ ​ (c)  

• Sin(40)

• w

• 28

• Cos (40)

• tan 40

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

• sine

• cosine

• tangent

• cotangent