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!
Bell Ringer Review θ 2√3 4 2
New Material • All we’re doing today is naming the functions that represent the ratios from the bell ringer!
SOH-CAH-TOA 5 3 Θ 4
5 Now fill in with regard to 3 Θ 4
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