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Precalculus Flashcards | StudBud
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Precalculus
Precalculus
30 terms
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Questions
30
Answers
1
Which graphs are symmetric about the y-axis:
A & B
C
A
D
2
What are imaginary numbers?
Something divided by zero
The square root of a non perfect square
The square root of a negative.
Wumbo
3
Trigonometry
D
B
A
C
4
How many radians are in a circle?
6
360
π
2π
5
Give the period of y = 2 sin (3x + 4π).
4π
2
2π/3
3π/2
6
Which of these graphs represents y+3=-2cos(x-π/4)?
A
B
C
D
7
What is 240° in radians?
a
d
c
b
8
What is Cos -30°
1
√2/2
1/2
√3/2
9
If the black graph is y= sin(x), then the the red and blue graphs are, respectively:
y= (-2)sin(x), y= (2)sin(x)
y= (2)sin(x), y=(-2)sin(x)
y= (0.5)sin(x), y= (2)sin(x)
y= (2)sin(x), y= (0.5)sin(x)
10
Piecewise Functions
f(2) = 61
f(2) = 8
f(2) = 8 and f(2) = 61
f(2) = 2
11
Which graphs have domain: (-∞, ∞)
A & D
D
A
none
12
Division of polynomials
gives complex zeroes.
is a factor of the polynomial.
is the only factor of the polynomial.
is not a factor of the polynomial.
13
Give the period of y = sin 2(x + 5π).
5π
2π/5
2π
π
14
Polynomials
2
5
4
6
15
What type of graphs are these ?
A - curvy, B - double curvy, C - twisty, D - straight
A - Cubic, B - Quadratic, C - Reciprocal, D - linear
A - Quadratic, B - Reciprocal, C - Cubic, D - linear
A - Quadratic, B - Cubic, C - Reciprocal, D - linear
16
Multiplying Imaginary Numbers
C
D
A
B
17
Graphing Polynomials!
B
C
D
A
18
Rationalizing Imaginary Numbers
B
C
A
D
19
Polynomials
a = 2, Use Synthetic Division, Set factors = 0
Divide the polynomial by 2 - x
Set x = 0 in the polynomial, See what y is.
Multiply the polynomial by 2 then factor it
20
Piecewise Functions
f(5) = 12
f(5) = 16 and f(5) = -12
f(5) = -12
f(5) = 16
21
Which graphs represent even functions:
B
A
A & B
A & C
22
Trigonometry Question 1
C
D
A
B
23
Sin 37° = Cos ____
53°
47°
37°
143°
24
Polynomials
b
d
a
c
25
Polynomials
a
b
d
c
26
What is Sin 120°
1/2
-1/2
-√3/2
√3/2
27
WHAT IS THE DIFFERENCE BETWEEN THESE 2 GRAPHS?
The period was divided by 2, the period is now 7pi/2.
Nothing, there is no difference.
There is an amplitude change. The amplitude went from 1 to 2
There is a phase shift of 2.
28
Which of the following graphs is translated down 2, left π/2, and has a period of π?
y = π/2 + sin(2x - 2)
y = -2 sin(2x + π)
y = sin(2(x + π/2)) - 2
y = sin(2x + π/2) - 2
29
Which graphs are symmetric about the origin?
A & C
A & D
B & C
C & D
30
Which of these are functions?
1 only
none of these are functions
1, 2, 3 and 4
1 and 2 only
