Ezra :
B
Maths
Simple interest
Compound interest
% Increase
I
=>
=>
A
ut
=
=
PCI
increase
=
original
Decrease
%
=
P-Principle
I Interest
A P+ I
=
:
,
R Rate
Titime
:
+, )
,
I
=
A
P
-
amount <100-
decrease amount <100 %
original
Proportion
t
Direc
k
Direct-reg
Inverse
x
y2x
right
y
( +,
-
)
y y,
-
run
*
M=
of the line
=
M(x
Y2 -y,
Oz
-
d ,
Quadratic
y
=
ax+ bx + C
Di
-
ac
be
2a
-
,
kx
x
equ
m : rise
=
kil
right
Gradient
*
- . .
i
given
-
Varie S
:
x, )
-
-
,
,
Inverse
ycL
x
y
:
Kiely
B
Vector
A
a
=
AB
:
y2
+Bl :T
(i)
BF
:
Y
F
G
A
D
Head and Tail
atk
+
>
-b
-b
=
④
a
Parallel
a/lb Aim
Ta
7
or
b=ma
b
Position Vector
A(3, 4)
? ) 3i
o (
:
-
*
O
a +
:
-=X
=
-
-
4j 101
=
=
pb xa reb
+
=
,
L=x 0 ,
B) 7, 5)
+
B x (qAb)
:
B x 0(a/b)
=
=
x+
y2
Coordinate
Geometry
* distance
: (D) > -x , +
Gradient
*
(42 G ?
-
,
* mid point
(m) = 32-3 ,
dy- D
:
(D,
+(2
Yit]
+
Z
B(xn yz)
,
*
n
AP P
:
:
M
N
:
XP(x y)
,
y n4 , + Myz
& : 32 , + MDz
:
,
m+ h
Mth
Eq of the st
*
The
y
:
M
.
A (x , y ,
line
Mx + 4
*
↳ gradient
y y
-
,
=
M(x
C4)
-
*
by
ax +
+
c
:
0
relationship between two lines
I /12
,
m,
,
< 1 , 112
,
Mz
=
m , xm : -1
[mimti
Modulus Formula
A (a , y , ) , B(0k 32) , <[23 Y3) D(Dy , yu)
,
,
A of ABCD
.
:
,
Y * ↳
↳ x
I
H !-
H((D
,
xxz
Du
x I
Yz
yu
y
y3
y , + dyy + x(3)y + 2(uy , )
-
(b , y , +
C(x)
,
+
x(uy , +2) yy)
,
r onometry
Tg
A
-
C
b
h
f
T
B
L
A
Sine Rule
Cos
=>
Rule =
LA
b
a
I
sin A
sin B
C
=
sinc
a b+ -Zb(xos(A)
=
=
cost) birc (
AmbiguousCase
When b < c there
,
Ambiguous angles
are
= sin
two solutions
(a): sin (180 -x