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Flashcards in Equations Deck (29)
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1

Quadratic equation

x = −b ± √(b² − 4ac)
------------------------------
2a

2

volume of a prism

CSAxL

3

Area of a trapezium

1/2((a+b)h)

4

Area of a circle

πr²

5

Circumference of a circle

πd

6

Area of a triangle

~ 1/2abSinC
~ (BxH)/2

7

sine rule

a = b = c
------ ------ ------
SinA SinB SinC

8

cosine rule

a² = b² + c² - 2bcCosA

9

compound growth and decay

N=N0(multiplyer)n

10

density =

mass/volume

11

pressure

force/area

12

cosine rule for angle

CosA = b² + c² - a²
---------------
2bc

13

compound interest

total = p ( 1 + (r /100))^n
p = amount
r = interest rate
n= time

14

Area of a Sector

(theta/ 360)x area of circle

15

Area of Arc

(theta/3060)x circumference of circle

16

what does a translation on the X axis look like?

y =f(x-a)

17

what does a translation on the X axis look like?

y = f(x) + a

18

If the translation is on the Y axis what does a ADD sign mean?

go up

19

If the translation is on the X axis what does a MINUS sign mean?

go right

20

What is sin(0)

0

21

What is sin(90)

1

22

What is Tan(0)

0

23

What is Cos(0)

1

24

What is Cos(90)

0

25

How to find the mean from a histogram?

total (fx)
--------------
frequency

26

How do you find out frequency density?

frequency / class width

27

what does a 1/x graph look like?

a sideways x

28

what does a 1/x squared graph look like?

a tree trunk

29

V=πr2h/3

volume of a cone