1. Find the missing side. Round to the nearest tenth.x
Awesome!

2. Find the missing side. Round to the nearest tenth.
20 ft x
Great Work!

3. A person is 200 yards from a river
A person is 200 yards from a river. Rather than walk directly to the river, the person walks along a straight path to the river’s edge at a 60° angle. How far must the person walk to reach the river’s edge?
cos 60°
x (cos 60°) = 200
200
60° x x
X = 400 yards
WOW !!

4. x
116 m
Amazing Work!

5. Ex: 5
A surveyor is standing 50 feet from the base of a large tree. The surveyor measures the angle of elevation to the top of the tree as 71.5°. How tall is the tree?
tan 71.5° ?
tan 71.5°
71.5°
y = 50 (tan 71.5°) 50
y = 50 ( )

6. When we are trying to find a side we use sin, cos, or tan.
When we are trying to find an angle
we use sin-1, cos-1, or tan-1.

7. Ex. 3: Find . Round to three decimal places.
200
Use the inverse button!!!
400
Make sure you are in degree mode (not radian).