Transcript 5.2
5.2
Trigonemtric Ratios in Right
Triangles
Reciprocal Functions
Hypotenuse H
sec
Adjacent leg A
Hypotenuse H
csc
Opposite leg O
Adjacent leg A
cot
Opposite leg O
Example
Find the value of each of the six trigonometric functions
of if b=4 and c=2 5.
c2 5
b4
Example
The irregular blue shape is a pond. The distance across
the pond, a, is unknown. To find this distance, a
surveyor took the measurements shown in the figure.
What is the distance across the pond?
1200 yards
Example
A building is 40 feet high and it casts a shadow
36 feet long. Find the angle of elevation of the
sun to the nearest degree.
40 feet
36 feet
Find the cos .
1
3
3 10
10
(b) 3
10
(a)
10
10
1
(d)
10
(c)