DO NOW 1/5:
Label the opposite, adjacent and
hypotenuse for reference angle A.
θ
The
Trigonometric
Ratios
Agenda
1. Do Now
2. Quiz Review
3. Lesson 26 #1-4
4. Trigonometric Ratios
5. Fisher Building Problem
6. Debrief
Quiz Review
Lesson 26: Classwork #1-3
Sine, Cosine and Tangent

SOH CAH TOA

sinθ=

cosθ=

Tanθ=
**MUST BE IN
NOTES!**
Lesson 26: #4-6 (In Groups)
 Each
group spend ____ minutes working
on answering and completing the table
for #4, 5 and 6.
 Once
your group is finished, record you
answers on your sheet and have one
representative record it on the board.
 Begin
Independently working on #7-9
Lesson 26 #4
Lesson 26: #5
Lesson 26: #6
Debrief
 Discuss
in shoulder partners, then at your
table, then whole group:


What were the patterns you noticed in
solving #8?
How did you use sin, cos and tan to solve
#7?
DO NOW 1/6:
Write the sin, cos and tan for the
reference angle shown below.
Common Trig
Ratios
10
5
θ
5√3
Agenda
1. Problem Set Review
2. Trig Unit Quadrant
Construction
3. Ratios of 0, 30, 45, 60, 90
4. Special Right Triangles
with Trig
5. Debrief
Construct a Trig Unit Quadrant
 On
a blank scrap sheet, use the compass
to draw a quarter circle using a corner of
the sheet as your center point.
 Put a protractor centered on the corner
an mark off 30, 45, 60 degrees (the edges
of the sheet will be 0 and 90)
 Use a ruler to create a table of the sine,
cosine and tangent of each triangle. Look
for patterns!
Table of Common Ratios
θ
sinθ
cosθ
tanθ
**MUST BE IN NOTES!**
0°
30°
45°
60°
90°
Debrief/Exit Ticket
 Solve
for the variables using your trig table
DO NOW 1/7:
Find the lengths of the
missing sides of the right
triangles.
Using
Calculators with
Sine and Cosine
Agenda
1. Problem Set Review
2. Using sin, cos, tan on
calculators
3. Trig Practice (word
problems)
4. Fisher Building (Debrief)
Using calculator for sin, cos, tan
1. What patterns do you notice between sin and cos?
2. Give an explanation for the patterns you see.
Example 1
Word Problem Example
Debrief
 How
could we set up a problem that
would tell us the height of the Fisher
Building?
DO NOW 1/9:
A 25 ft ladder is leaning up
against a building at a 75
degree angle.
How far is the base of the
ladder from the building?
Trig Word
Problem
Agenda
1. Exit Ticket Review
2. Word Problem practice
(elevation and
depression)
3. Construct sextant
4. Debrief
Trig Word Problems
Trig Word Problems
Trig Word Problems
“angle of elevation”
“angle of depression”
Trigonometry and Sextants
Sextants were historically
used during nautical
exploration to determine
distance and location by
using the location of the sun
and stars.
https://www.youtube.com/watch?v=D
rAkrgZRb9Y
Debrief
 How
could we set up a problem that
would tell us the height of the Fisher
Building?