Find Missing Side of Right Triangle Using Trigonometry

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

Choose the correct technique to find the missing side of this triangle

• Pythagoras Theorem

• Trigonometry Ratio

• Sine Rule

• Cosine Rule

What are the techniques that you need to find the missing side?

• Trigonometry Ratios and Sine Rule

• Trigonometry Ratios and Cosine Rule

• Pythagoras and Sine Rule

• Pythagoras and Cosine Rule

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

• Any triangle ever

• Non-right triangles only

• Right Triangles only

• Never

Solve for x. Round to the nearest tenth.

• 46.1

• 4.9

• 73.5

• 68.6

Find x.

• 10

• √3

• 5

• 10√3

• 7/24

• 24/7

• 7/25

• 24/25

Which trigonometric ratio/function should you use based on the given information?

• Tangent Ratio

• Sine Ratio

• Cosine Ratio

• Any ratio

Set up the problem so you can solve for h. Think about which trig ratio you need.

Set up the problem so that you can solve for X. Think about which trig ratio you need to use.

• sin X = 41/28

• tan X = 41/28

• cos X = 28/41

• sin X = 28/41