things to remember Flashcards
percentage change
[(final - original)/orginal] x 100
new amount
orginal x (100 + or - rate/100)
compound interest
original x (100 + rate%/ 100)^ no. of years
formula for nth term
a + (n-1) d
gradient
rise/run
gradient of parallel lines are ….
equal
gradient of parallel lines
m1 x m2 = -1
midpoint
(x1+x2/2), (y1+y2/2)
length of line joining points x1 and y1 and x2 and y2
l= square root of (x1- x2)^2 - (y1-y2)^2
values that should be excluded from the domain
- values that makes the denominate 0
- range of values that give a negative seuqare root
(a/b) ^- n =
(b/a)^n
(a/b)^m/n
n square root (b/a) to the power of m
turning point for max or min
0
velocity
ds/dt
acceleration
dv/dt
sum of all interior angles
180 (n-2)
exterior angles add up to…
360
in a regular polygon, no of sides=
360/ one interior angle
1 cm^3
1 ml
circumference of circle
2 pie r
length of arc
2 pie r x 0/360
area of sector
pie r squared x tita/360
perimeter of sector
length of arc + 2r
intersecting chords
AE X EB = CE X ED
frequency denstiy
frenquency/ class width
P (A)
n( A)/ n (E)
multiply along branches
AND
add different brances
OR
