Algebra II TRIG Flashcards

Algebra II TRIG Flashcards•As the year goes on we will add more and more flashcards to our collection. •Bring your cards every TUESDAY for eliminator practice!•Your flashcards will be collected on every test day! At the end of the quarter the grade received will be equivalent in value to a test grade. Essentially, if you lose your flashcards it will be impossible to pass the quarter.

What will my flashcards be graded on?

• Completeness – Is every card filled out front and back completely?

• Accuracy – This goes without saying. Any inaccuracies will be severely penalized.

• Neatness – If your cards are battered and hard to read you will get very little out of them.

• Order - Is your card #37 the same as my card #37?

Quadratic Equations• Pink Card

Vertex Formula(Axis of Symmetry)

What is it good for?

#1

Tells us the x-coordinate of the maximum point

Axis of symmetry

a

bx

2

#1

Quadratic Formula

What is it good for?

#2

Tells us the roots (x-intercepts).

a

acbbx

2

42

#2

Describe the Steps for “Completing the

Square”• How does it compare to the quadratic

formula?

#3

1.) Leading Coeff = 1 (Divide if necessary)

2.) Move ‘c’ over3.) Half ‘b’ and square (add to both sides)

4.) Factor and Simplify left side.5.) Square root both sides (don’t forget +/-)

6.) Solve for x.

*Same answer as Quadratic Formula.

#3

General Form for DIRECT VARIATION

Characteristics & Sketch

#4

General Form: y = kx

Characteristics: y –int = 0 (always!)Sketch: (any linear passing through the origin)

#4

Define Inverse Variation

#5

Give a real life example

•The PRODUCT of two variables will always be

the same (constant).xy=c

• Example:–The speed, s, you drive and the time,

t, it takes for you to get to Rochester.

#5

State the General Form of an inverse variation equation.

Draw an example of a typical inverse variation

and name the graph.#6

xy = k or . x

ky

HYPERBOLA (ROTATED)

#6

General Form of a Circle

#7

radiusr

Centerkh

rkyhx

),(

222

#7radius

Center

yx

2550

)0,2(

50)2( 22

FUNCTIONSBLUE CARD

Define Domain

Define Range

#8

• DOMAIN - List of all possible x-values (aka – List of what x is allowed to be).

• RANGE – List of all possible y-values.

#8

Test whether a relation (any random equation) is a FUNCTION or not?

#9

Vertical Line Test• Each member of the DOMAIN

is paired with one and only one member of the RANGE.

#9

Define 1 – to – 1 Function

How do you test for one?

#10

1-to-1 Function: A function whose inverse is also a function.

Horizontal Line Test

#10

How do you find an INVERSE Function…

ALGEBRAICALLY?

GRAPHICALLY?

#11

Algebraically:Switch x and y…

…solve for y.Graphically:

Reflect over the line y=x (look at your table and switch x & y values)

#11

1.)What notation do we use for Inverse?

2.) Functions f and g are inverses of each other if _______ and ________!

3.) If point (a,b) lies on f(x)… #12

)(1 xf

2.) f(g(x)) = x and g(f(x)) = x

3.) …then point (b,a) lies on

1.) Notation:

#12

SHIFTSLet f(x) = x2

Describe the shift performed to f(x)• f(x) + a• f(x) – a• f(x+a)• f(x-a)

#13

• f(x) + a = shift ‘a’ units upward• f(x) – a = shift ‘a’ units down.• f(x+a) = shift ‘a’ units to the left.• f(x-a) = shift ‘a’ units to the right.

#13

COMPLEX NUMBERSYELLOW CARD

Explain how to simplify

powers of i

#14

• Divide the exponent by

4.

Remainder becomes the

new exponent.

ii 3

ii 3

12 i

ii 1

10 i

#14

Describe How to Graph Complex Numbers

#15

• x-axis represents real numbers

• y-axis represents imaginary numbers

• Plot point and draw vector from origin.

#15

How do you evaluate the ABSOLUTE VALUE (Magnitude) of a

complex number?

|a + bi||2 – 5i|

#16

Pythagorean Theorem|a + bi| = a2 + b2 = c2

|5 – 12i| = 13

#16

How do you identify the NATURE OF THE ROOTS?

#17

DISCRIMINANT…

acb 42 #17

#18

acbifWhat 42

POSITIVE,

PERFECT SQUARE?

ROOTS = Real, Rational, Unequal

• Graph crosses the x-axis twice.

#18

POSITIVE, NON-PERFECT SQUARE

#19

acbifWhat 42

ROOTS = Real, Irrational, Unequal

• Graph still crosses x-axis twice

#19

ZERO

#20

acbifWhat 42

ROOTS = Real, Rational, Equal

•GRAPH IS TANGENT TO THE X-AXIS.

#20

NEGATIVE

#21

acbifWhat 42

ROOTS = IMAGINARY

•GRAPH NEVER CROSSES THE

X-AXIS.

#21

What is the SUM of the roots?

What is the PRODUCT of the roots?

#22

02 cbxax

• SUM =

• PRODUCT =

a

b

#22

a

c

How do you write a quadratic equation given

the roots?

#23

• Find the SUM of the roots

• Find the PRODUCT of the roots

#23

02 productsumxx

Multiplicative Inverse

#24

• One over what ever is given.

• Don’t forget to RATIONALIZE

• Ex. Multiplicative inverse of 3 + i

10

3

3

3

3

13

1

i

i

i

i

i

#24

Additive Inverse

#25

• What you add to, to get 0.

• Additive inverse of -3 + 4i is 3 – 4i

#25

Inequalities and Absolute Value

Green card

Solve Absolute Value …

#26

• Split into 2 branches• Only negate what is inside the

absolute value on negative branch.

• CHECK!!!!!

#26

Quadratic Inequalities…

#27

• Factor and find the roots like normal

• Make sign chart

• Graph solution on a number line (shade where +)

#27

Solve Radical Equations …

#28

• Isolate the radical

• Square both sides

• Solve

• CHECK!!!!!!!!!#28

Rational Expressions

pink card

Multiplying &

Dividing Rational Expressions

#29

• Change Division to Multiplication flip the second fraction

• Factor

• Cancel (one on top with one on the bottom)

#29

Adding&

Subtracting Rational Expressions

#30

• FIRST change subtraction to addition

• Find a common denominator

• Simplify

• KEEP THE DENOMINATOR!!!!!!

#30

Rational Equations

#31

• First find the common denominator

• Multiply every term by the common denominator

• “KILL THE FRACTION”

• Solve

• Check your answers #31

Complex Fractions

#32

• Multiply every term by the common denominator

• Factor if necessary

• Simplify

#32

Irrational Expressions

Conjugate

#33

•Change only the sign of the second term

• Ex. 4 + 3i conjugate 4 – 3i

#33

Rationalize the denominator

#34

• Multiply the numerator and denominator by the CONJUGATE

• Simplify

#34

Multiplying &

Dividing Radicals

#35

• Multiply/divide the numbers outside the radical together

• Multiply/divide the numbers in side the radical together

#35

3812423

2412

1563352

Adding &

Subtracting Radicals

#36

• Only add and subtract “LIKE RADICALS”

• The numbers under the radical must be the same.

• ADD/SUBTRACT the numbers outside the radical. Keep the radical #36

272324

1824

Exponents

When you multiply… the base and the exponents

#37

• KEEP (the base)

• ADD (the exponents)

#37

853 222

baba xxx

When dividing… the base&

the exponents.

#38

• Keep (the base)

• SUBTRACT (the exponents)

#38

67

33

3

bab

a

xx

x

Power to a power…

#39

•MULTIPLY the exponents

#39

22

4

1

4

2

14

2

1

xxxx

xx abba

Negative Exponents…

#40

•Reciprocate the base

#40

666

66

1)(

22

baab

bb