1.
Select the graph of
.
A.
B.
C.
D.
Hint
2.
Simplify sec
cos
.
A.
1
B.
sin
2
C.
cos
2
D.
tan
2
- 1
Hint
3.
Simplify the expression sin
x
(1 + cot
2
x
)
A.
sin
x
tan
x
B.
1 + cos
2
x
C.
sin
2
x
D.
csc
x
Hint
4.
Write (cos
x
)(sec
x
– cos
x
) as an expression involving only sin
x
.
A.
1- sin
2
x
B.
C.
sin
2
x
D.
2 sin
x
Hint
5.
Determine sin 2
x
if
x
is between 180° and 270° and sin
x
=
.
A.
B.
C.
D.
Hint
6.
What is the exact value of cos 2
x
if cos
x
=
and
x
is in quadrant II?
A.
B.
C.
D.
Hint
7.
Solve tan
2
x
– sec
x
= 1 for
.
A.
B.
C.
D.
Hint
8.
What is the amplitude and period of the function
y
= 3 cos (-
)?
A.
Amplitude = 3,
Period =
B.
Amplitude = 3,
Period = –
C.
Amplitude = 2,
Period =
D.
Amplitude = 3,
Period = 2
Hint
9.
How is the function
y
= cos (
¨C 30) shifted?
A.
shifted 30° up
B.
shifted 30° down
C.
shifted 30° to the right
D.
shifted 30° to the left
Hint
10.
A runner's pace oscillates during a race between 9 mph and 13 mph. For a one-hour race, this person's pace oscillates 20 times. What is a sine function that represents this situation?
A.
y
= 4 sin
+ 9
B.
y
= 2 sin
+ 9
C.
y
= 2 sin
+ 11
D.
y
= 4 sin
+ 11
Hint
11.
Which expression is equivalent to 2 tan
?
A.
B.
C.
D.
Hint
12.
Find the exact value of cos (480°).
A.
B.
C.
D.
Hint
13.
Which statement is true?
A.
sin 30° = cos 300°
B.
cos 135° = sin 45°
C.
cos 225° = sin 45°
D.
sin 45° = –cos (–45°)
Hint
14.
Which of the following contains a false solution to the equation sin
cot
– cos
2
= 0?
A.
90° and 270°
B.
0° and 180°
C.
0° and 270°
D.
90°
Hint