1. What is
2. What is
3. What is
4. What is
opp
hyp
opp
adj
adj
hyp
hyp
opp
3/1 Bell Ringer
?
θ
?
2√3
4
?
?
Homework: Finish Today’s
Independent Practice
2
3/1 News and Notes
•
•
•
•
Perfection Award: 4th Period
Tests back
Reminder about test corrections
Perfection Competition Daily Results
QUIZ FRIDAY!
4
4
4
4
3.5
3
3
2.5
2.5
2
1.5
1
0.5
0
1st
2nd
4th
7th
8th
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
SOHCAHTOA
SOH-CAH-TOA
opp
sin   
hyp
adj
cos  
hyp
opp
tan   
adj
Sin(Θ) =
Cos(Θ) =
Tan(Θ) =
5
3
Θ
4
Now fill in with regard to
5
3
4
Sine (sin)
Cosecant (csc)
Cosine (cos)
Secant (sec)
Tangent (tan)
Cotangent (cot)
hyp
adj
3
5
5
3
4
5
5
4
adj
opp
3
4
4
3
hyp
opp
Θ
Quick Check - SOHCAHTOA
• What trig ratio is represented by 3/5 in
following diagram?
• 3 = adj
3
• 5 = hyp
• Adj/hyp = COSINE!  cos(Θ) = 3/5
Θ
5
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
15
sin   
equation
x
• 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
r
In the figure below, what is ?
t
A.
B.
C.
D.
sine of angle G only
cosine of angle G only
cosine of angle H only
sine of angle G and cosine of
angle H.
E. Sine of angle H and cosine of
angle G.
Homework:
Finish IP