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The Δelta βeta αrchivesThe \ \Delta elta \ \beta eta \ \alpha rchives
CHAPTER 01
Δβα\Delta _{\beta \alpha}

Linear functions

CHAPTER 02
Δβα\Delta _{\beta \alpha}

Quadratic functions

under construction
CHAPTER 03
Δβα\Delta _{\beta \alpha}

Functions

under construction
CHAPTER 04
Δβα\Delta _{\beta \alpha}

Trigonometry

under construction
CHAPTER 05
Δβα\Delta _{\beta \alpha}

Trigonometric functions

under construction
CHAPTER 06
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Linear algebra

under construction
CHAPTER 07
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Vectors

under construction
CHAPTER 08
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Logarithms

under construction
CHAPTER 09
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Complex numbers

under construction
CHAPTER 10
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Differentiation

under construction
CHAPTER 11
Δβα\Delta _{\beta \alpha}

Integration

under construction
The Δelta βeta αrchivesThe \ \Delta elta \ \beta eta \ \alpha rchives
Where your mathematical journey changes
About
I completed my iGCSEs between 2022 and 2024 (scored 8s and above across 8 iGCSEs), but faced difficulty finding resources that comprehensively explained concepts and provided enough difficult practice questions whilst being free.
With
The Δelta βeta αrchivesThe \ \Delta elta \ \beta eta \ \alpha rchives
, I hope to bring access to IB-level math education for those who would rather not spend hundreds on online courses or physical textbooks.
Features
find

find
r

Search through formulae and notes quickly

drill

drill
r

Practice with randomized questions (Math AA, Physics HL)

bookmark

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r

Bookmark sections or subsections (feature coming soon!)

type

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r

Write and preview LaTeX

Content Overview
This content is focused more on IB AA HL-level studies, though some concepts should be accessible at iGCSE level. When working through coursework or problems, attempt to do them without a calculator at first - there will be some questions marked by a calculator symbol where you are permitted to use your calculator!
Any formulae in findr is based on the International Baccalaureate Mathematics Analysis and Approaches Version 1.0 First examinations 2021 formula booklet.
Prerequisites
When going through this course, you're required to be proficient in the following areas:

Solving linear equations

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    Algebraic fraction manipulation
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    Simultaneous equations
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    Perpendicular lines

Surds

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    Simplifying basic surds
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    Rationalizing denominators

Function notation

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    Inverse functions
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    Composite functions

Quadratics

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    Discriminant
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    Roots (or "zeros")
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    Quadratic formula

Algebraic proofs

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    General numerical proofs
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    Algebraic proofs

Vector proofs

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    General proofs
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    Colinear proofs
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    2D vector spaces

Trigonometric functions

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    Solving functions
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    Unit circle
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    Graphs of sin/cos/tan

3D geometry

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    Area/surface area
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    Angle calculations

Calculus

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    Basic differentiation
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    Basic integration
Sample ECQ (Q01H)
The line
L2L_2
is parallel to another line,
L1L_1
, with an equation
f(x)=5(x+2)−4f(x)=5(x+2)-4
and passes through the point
L2A(3,5)L_{2A}(3,5)
.
(
aa
) Find the points of intersection (
L2BL_{2B}
and
L2CL_{2C}
) on
L2L_2
created by two lines perpendicular to
L1L_1
at the points
L1A(0,6)L_{1A}(0,6)
and
L1B(52,52)L_{1B} \left( \frac{5}{2},\frac{5}{2} \right)
.
(
bb
) Find the perpendicular bisector of the line segment
[L2B L2C][L_{2B} \ L_{2C}]
.
(
cc
) Find the solutions - on the
xx
-axis - of the perpendicular bisector you just created, and any previous lines you generated.