Vigtige Formler Flashcards
Tangens ud fra sinus og cosinus

External Angles

cos(60o)

Proporties of rhombus
- ALL sides are equal
- Oposite sides are parallel
- Diagonals are perpendicular
- Sum of any adjacent angles are 1800

Sum af første n tal i en arithmetric sekvens

How does a Venn diagram with 2 mutual explusive events look like

Sum af uendelige geometrisk sekvens
r er faktoren, som adskiller to efterfølgende tal i sekvensen

What is this

Histogram with unequal class intervals
Area of bar NOT High tells frequency
Omskriv tan(A/2)

Formel for produkt af rødder i polynomie

Når A+B=90o gælder

MODE
Ungrouped data

Eksempel på bestemmelse af inversfunktion
Find den inverersefunktion af:


cos(90o)
0
Defination på “ulige” funktion

Shade in Venn diagram


What is the funktion


Sidelængder i 45-45-60 Trekant, når benene er a lange
(Isoceltrekant)

Polar Koordinater

- What is this
- What is it used for

- Probability Tree
- repeated condentional events
Translate to words

“Poperbility of B occuring, when A also occurs/has occured”
Obtuse Triangle

Pythagoras sammenhænge for cot og csc

Omskriv cos(A/2)

Mean for ungrouped data

Vigtig ting at huske i forhold til sansynlighed

Distance Formlen

Completing Square

Defination på “lige” funktion

tan(30o)

Sammenhæng mellem buelængde, radius og vinkel i RADIANER

tan(60o)

Ændring i logaritme base formel

tan(45o)
1
Mathematical Equations
Statement expressesing the equality of two mathematical expressions
How do you grafically represent sets
Venn Diagram

Omskriv
tan(A-B)

What is this?

A pictogram
Proporties of trapezium
- ONLY one pair of opporsite sides are parallel

This is an example of …..

an iterative process

Omskriv sin(2A)

Pythagoras sammenhænge for
tan og sec

Omskriv cos(2A)

Translate to words

“Poperbility of A occuring, when B also occurs/has occured”
Omskriv
cos(A+B)

Cosecant csc(x)

Formel for summen af rødder i polynomie

Factorize


sin(0o)
0
- , 2. og 3. kvadratsætning

Eksponent regl for logaritmer

Powerfull toll solving properbility problems with independent events

Inversly proportinal

Relative expected frequencies is equal to ….
Theoretical Probability
Formula for area of a TRAPEZ

Collectively Exhaustive Set
When at least one of the events must occur
Det n’te tal i en geometrisk sekvens

Conditional probability rule (Probabilty Tree)

ESTIMATE Mean of Grouped data

What is this?

Two-Way Table / Contingency Table
What is this

Cumulative Frequency Graph
Drawn by plotting the upper class boundary
- What is this
- What is it used for

- Probability Tree
- repeated independent events
Formel for vinkel mellem to linjer i planen


What is this

Frequency tree
Fomula for growth and deacay problems

Periode, Amplitude og middellinje for:


Formel for asymptoter for hyperbel med formel


tan(0o)
0
Amplitude, periode og middellinje for


Areal og omkreds af parrallelogram

Scalene Triangle
ALL sides have different lenths

Proporties of Kite
- Combination of 2 isoceles triangles
- Consecutive sides are equal
- ONE pair of opporsite angles are congruente
- Diagonals form perpendicular bisectors

Parabel på Vertex form

Defination for logaritmer

Gruppe Formel

Sidelængder i 30-60-90 Trekant

Cirklens Ligning

cos(0o)
1
Omskriv tan(2A)

Sammenhæng mellem sinus og cosinus

What is this formula used for

Properbility of 2 INDEPENDENT events happening together
Omskriv
sin(A+B)

Koordinater for Midtpunktet på et Linjestykke

What is this?

A Bar Chart
Proporties of pallogram
- Oppostie angles are equal
- Oppostie sides are equal and parallel
- Sum of any adjecent angles are 1800

Formel for asymptoter for hyperbel med formel


Vinkelsum i polygoner
180(s-2)
Hvor s er antallet af sider
Omskriv sin(A/2)

Cotangent cot(x)

Mathematical expressions

General Ligning for Elipse
Elipsens centrum er i (h;k)
Elipsens brede (variation på x-aksen) er 2a
Elipens højde (variation på y-aksen) er 2b

Truncation
Limiting the number of digits right of the decimal point
sin(30o)

What is this?

A Frequency Table
Shade in Venn diagram


sin(450)

Det n’te tal i en arithmetric sekvens

Mathematical Formula
A fact or rule that uses mathematical symbols
Reflection

Areal af regulær trekant

Rule for determining if events are idependent

Translate to words


Produkt og koefficent regl for logaritmer

Omskriv
sin(A-B)

Herons formel for areallet af en trekant

Areal af kvadrat ved brug af diagonal

Concept of similarity
Equal shape

Ligning for Elipse med centrum i (0,0)
Elipsens brede (variation på x-aksen) er 2a
Elipens højde (variation på y-aksen) er 2b

Acute Triangle

Concept of congruency

Omskriv cos(A-B)

Shade in Venn diagram


Konverter fra xy-koordinater til polar koordinater
r2 = x2 + y2

Cuboid

Ændring i procent

Secant sec(x)

Omskriv
tan(A+B)

Mathematical Identity
Equation which is true regardless of what values
What is this?

Pie Chart
Konverter fra polar koordinater til xy-koordinater

Convert ratio to fractions


What is what in scale ratio on map

Range of ungrouped data

Median of ungrouped data

Sinus relationerne

Translate to words


sin(60o)

Distance formel

cos(45o)

Cosinus relationerne

Translate to words


Sum af første n tal i en geometrisk sekvens
r er faktoren, som adskiller to efterfølgende tal i sekvensen
a_1 er første tal i sekvensen

What is this?

Line Graph for time series
What is this?

A vertical line chart
Symestriaksen for en parable

sin(90o)
1
cos(30o)

Frequency Density
For a set of grouped data
