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

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CCSS.HSG.SRT.C.8

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

• Pythagoras Theorem

• Trigonometry Ratio

• Sine Rule

• Cosine Rule

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CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

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

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CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

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

• Any triangle ever

• Non-right triangles only

• Right Triangles only

• Never

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CCSS.HSG.SRT.C.7

Solve for x. Round to the nearest tenth.

• 46.1

• 4.9

• 73.5

• 68.6

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CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Find x.

• 10

• √3

• 5

• 10√3

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CCSS.HSG.SRT.C.8

• 7/24

• 24/7

• 7/25

• 24/25

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CCSS.HSG.SRT.C.6

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

• Tangent Ratio

• Sine Ratio

• Cosine Ratio

• Any ratio

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CCSS.HSG.SRT.C.6

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

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CCSS.HSG.SRT.C.6

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

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CCSS.HSG.SRT.C.6