Download Section 8-4: Angles of Elevation and Depression

Bellringer
Turn Last week’s Bellringers into the folder on the
projector podium
Have Worksheet and Notes out on your desk
Work on p. 510 #1 – 7
SPI 3108.4.15 Determine and use the
appropriate trigonometric ratio for a
right triangle to solve a contextual
problem.
Refresher of Solving Trig Problems
Same process as on Friday
If it helps, you may want to go through and label
the Opposite (O), Adjacent (A), and Hypotenuse
(H) as your first step
Figure out what pieces you have and then set up
your ratio
Angles of Elevation/Depression
The angle of elevation is the angle looking up
from the horizontal line
The angle of depression is the angle looking down
from the horizontal line
They are equal to each other!
Word Problem
“A meteorologist measures the angle of elevation
of a weather balloon as 41 degrees. A radio signal
from the balloon indicates that it is 1503 m from
his location. To the nearest meter, how high
above the ground is the balloon?”
Draw the picture first!!
Using Angles of Elevation/Depression
Careful of “eye level” problems
The only difference is you add the eye level height
above the ground to your FINAL answer
“You see a rock climber on a cliff at a 32 degree
angle of elevation. Your eye level is 6 ft above the
ground and you are 1000 ft from the base of the
cliff. What is the approximate height of the rock
climber from the ground?”
Classwork/Homework
Worksheet
Quiz Tomorrow
Test on Thursday