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9.1
Basic Functions
9.2
Solving Right Triangles
9.3
Trigonometric Identities
9.4
Graphing Trigonometric Functions
9.5
The Unit Circle
9.6
Radians and Degrees
9.7
Graphing in the Entire Coordinate Plane
9.8
Key Formulas
9.9
Review Questions
9.10
Explanations
Review Questions
1.
In the triangle below, what is the length of
AC
?
(A)
0.56
(B)
0.95
(C)
1.30
(D)
1.71
(D)
5.54
2.
In the triangle below, what is the measure of
?
(A)
32.2º
(B)
40.2º
(C)
48.5º
(D)
49.7º
(D)
50.8º
3.
A boy flies a kite 100 feet from the ground. If the angle of elevation of the kite string is 55º, how many feet long is the kite string?
(A)
70.0
(B)
98.5
(C)
122.1
(D)
155.0
(D)
174.3
4.
If
then
x
= ?
(A)
30º
(B)
45º
(C)
60º
(D)
75º
(D)
90º
5.
If
and sin
and cos
are greater than zero, which of the following values could
not
be
?
(A)
10º
(B)
65º
(C)
90º
(D)
110º
(D)
165º
6.
The graph of
y
= 3 sin (
bx
) crosses the
x
-axis seven times in the interval
What is the value of
b
?
(A)
2
(B)
7/3
(C)
3
(D)
4
(D)
7
7.
What is the period and amplitude of the graph of the function
y
= 2 cos(4
x
+ 2) – 7?
(A)
period = Ï/2; amplitude = 2
(B)
period = Ï; amplitude = 2
(C)
period = 7Ï/2; amplitude = 4
(D)
period = 2; amplitude = 2
(D)
period = 4; amplitude = 2Ï
8.
Find the area of triangle
ABC
pictured below:
(A)
10.44
(B)
12.30
(C)
14.14
(D)
15.69
(D)
27.47
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?
then x = ?
and sin 
and cos 
are greater than zero, which of the following
values could not be 
?
What is the value of b?
