3/1 Bell Ringer

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# 3/1 Bell Ringer - PowerPoint PPT Presentation

θ. 3/1 Bell Ringer. 2√3. 4. What is ? What is ? What is ? What is ?. 2. Homework: Finish Today’s Independent Practice. 3/1 News and Notes. Perfection Award: 4 th Period Tests back Reminder about test corrections QUIZ FRIDAY!. Bell Ringer Review. θ. 2√3. 4. 2.

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θ

### 3/1 Bell Ringer

2√3

4

What is ?

What is ?

What is ?

What is ?

2

Homework: Finish Today’s Independent Practice

3/1 News and Notes
• Perfection Award: 4thPeriod
• Tests back
• Reminder about test corrections
• QUIZ FRIDAY!
New Material
• All we’re doing today is naming the functions that represent the ratios from the bell ringer!
Quick Check - SOHCAHTOA
• What trig ratio is represented by 3/5 in following diagram?
• 3 = adj
• 5 = hyp
• Adj/hyp = COSINE!  cos(Θ) = 3/5

Θ

5

3

4

Guided Practice
• A painter needs to reach the top of a 15 foot tall sign. He uses a ladder of length x to reach the top of the sign. The angle formed where the ladder meets the ground should be labeled Θ.
• Step 1: DRAW A PICTURE, labeling what you can.

Step 2: What trig ratio would you use to represent this situation? Explain why.

Sin because opp = 15 and hyp = x.

• Step 3: Write the full trig equation
• HONORS: If Θ = 60°, what is the length of the ladder?
Independent Practice
• We will finish with an Exit Ticket!
ACT Question of the Day

In the figure below, what is ?

A. sine of angle G only

B. cosine of angle G only

C. cosine of angle H only

• sine of angle G and cosine of angle H.
• Sine of angle H and cosine of angle G.

Homework: Finish IP