8.4 cont.notebook
January 30, 2014
"Do Now"
Using the given acute angle, label sides a, b, and c
in each of the triangles as "opposite," "adjacent,"
and "hypotenuse."
36
a
b
a
c
27
c
b
8.4 cont.notebook
January 30, 2014
Recap Last
Class
8.4 cont.notebook
January 30, 2014
8.4 cont.notebook
January 30, 2014
8.4 cont.notebook
January 30, 2014
Calculator Note:
Make sure your calculator is in
DEGREE mode (and not RADIAN)
8.4 cont.notebook
January 30, 2014
8.4 cont.notebook
January 30, 2014
3 Trig Ratios for
Right Triangles
1. Sine
2. Cosine
3. Tangent
Purpose for
Trig Ratios
Used to find a missing side length in a right
triangle
8.4 cont.notebook
January 30, 2014
SOH­CAH­TOA
8.4 cont.notebook
January 30, 2014
Find the values of x and y
8.4 cont.notebook
January 30, 2014
8.4 cont.notebook
January 30, 2014
EXERCISE A fitness trainer sets the incline on a treadmill to 7°. The walking surface is 5 feet long. Approximately how many inches did the trainer raise the end of the treadmill from the floor?
8.4 cont.notebook
January 30, 2014
EXERCISE A fitness trainer raises the incline on a treadmill to about 7.3 in. The walking surface is 5 feet long. Approximately how many degrees did the trainer raise the end of the treadmill from the floor?
7.3 in.
x
8.4 cont.notebook
January 30, 2014
8.4 cont.notebook
January 30, 2014
3 Inverse
Trig Ratios for
Right Triangles
1. Inverse Sine
2. Inverse Cosine
3. Inverse
Tangent
Purpose for
Inverse
Trig Ratios
Used to find a missing angle measure in a right
triangle
8.4 cont.notebook
January 30, 2014
Find the values of x and y
8.4 cont.notebook
January 30, 2014
EXERCISE A fitness trainer raises the incline on a treadmill to about 7.3 in. The walking surface is 5 feet long. Approximately how many degrees did the trainer raise the end of the treadmill from the floor?
7.3 in.
x
8.4 cont.notebook
January 30, 2014
Video