IB Mathematics

Applications and Interpretation SLFormula Booklet

Prior learning

Description	Formula
$\displaystyle \text{Area of a parallelogram}$	$\displaystyle A = bh, \text{ where } b \text{ is the base, } h \text{ is the height}$
$\displaystyle \text{Area of a triangle}$	$\displaystyle A = \frac{1}{2}(bh), \text{ where } b \text{ is the base, } h \text{ is the height}$
$\displaystyle \text{Area of a trapezoid}$	$\displaystyle A = \frac{1}{2}(a+b)h, \text{ where } a \text{ and } b \text{ are the parallel sides, } h \text{ is the height}$
$\displaystyle \text{Area of a circle}$	$\displaystyle A = \pi r^2, \text{ where } r \text{ is the radius}$
$\displaystyle \text{Circumference of a circle}$	$\displaystyle C = 2\pi r, \text{ where } r \text{ is the radius}$
$\displaystyle \text{Volume of a cuboid}$	$\displaystyle V = lwh, \text{ where } l \text{ is the length, } w \text{ is the width, } h \text{ is the height}$
$\displaystyle \text{Volume of a cylinder}$	$\displaystyle V = \pi r^2h, \text{ where } r \text{ is the radius, } h \text{ is the height}$
$\displaystyle \text{Volume of a prism}$	$\displaystyle V = Ah, \text{ where } A \text{ is the area of cross-section, } h \text{ is the height}$
$\displaystyle \text{Area of the curved surface of}\\ \text{a cylinder}$	$\displaystyle A = 2\pi rh, \text{ where } r \text{ is the radius, } h \text{ is the height}$
$\displaystyle \text{Distance between two}\\ \text{points $(x_1, y_1)$ and $(x_2, y_2)$}$	$\displaystyle d = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}$
$\displaystyle \text{Coordinates of the midpoint of}\\ \text{a line segment with endpoints}\\ \text{$(x_1, y_1)$ and $(x_2, y_2)$}$	$\displaystyle \displaystyle\left(\frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2}\right)$
$\displaystyle \text{Solutions of a quadratic}\\ \text{equation (HL only)}$	$\displaystyle \text{The solutions of } ax^2 + bx + c = 0 \text{ are } x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}, \text{ } a \neq 0$

Topic 1: Number and algebra

Topic	Description	Formula
$\displaystyle \text{SL 1.2}$	$\displaystyle \text{The $n$th term of an}\\ \text{arithmetic sequence}$	$\displaystyle u_n = u_1 + (n-1)d$
$\displaystyle \text{SL 1.2}$	$\displaystyle \text{The sum of $n$ terms of an}\\ \text{arithmetic sequence}$	$\displaystyle \displaystyle S_n = \frac{n}{2}(2u_1 + (n-1)d); \; \displaystyle S_n = \frac{n}{2}(u_1 + u_n)$
$\displaystyle \text{SL 1.3}$	$\displaystyle \text{The $n$th term of a}\\ \text{geometric sequence}$	$\displaystyle u_n = u_1r^{n-1}$
$\displaystyle \text{SL 1.3}$	$\displaystyle \text{The sum of $n$ terms of a}\\ \text{finite geometric sequence}$	$\displaystyle \displaystyle S_n = \frac{u_1(r^n - 1)}{r-1} = \frac{u_1(1-r^n)}{1-r}, \; r \neq 1$
$\displaystyle \text{SL 1.4}$	$\displaystyle \text{Compound interest}$	$\displaystyle \displaystyle FV = PV \times \left(1 + \frac{r}{100k}\right)^{kn}, \text{ where }FV\text{ is the future value,}\\[1em] \text{where }PV\text{ is the present value, }n\text{ is the number of years,}\\ \text{$k$ is the number of compounding periods per year,}\\ \text{$r\%$ is the nominal annual rate of interest}$
$\displaystyle \text{SL 1.5}$	$\displaystyle \text{Exponents and logarithms}$	$\displaystyle a^x = b \Leftrightarrow x = \log_a b, \text{ where } a > 0, b > 0, a \neq 1$
$\displaystyle \text{SL 1.6}$	$\displaystyle \text{Percentage error}$	$\displaystyle \varepsilon = \left\|\frac{v_A - v_E}{v_E}\right\| \times 100\%, \text{ where } v_E \text{ is the exact value and } v_A \text{ is}\\[1em] \text{the approximate value of } v$

Topic 2: Functions

Topic	Description	Formula
$\displaystyle \text{SL 2.1}$	$\displaystyle \text{Equations of a straight line}$	$\displaystyle y = mx + c; \; ax + by + d = 0; \\ y - y_1 = m(x - x_1)$
$\displaystyle \text{SL 2.1}$	$\displaystyle \text{Gradient formula}$	$\displaystyle \displaystyle m = \frac{y_2 - y_1}{x_2 - x_1}$
$\displaystyle \text{SL 2.6}$	$\displaystyle \text{Axis of symmetry of the}\\ \text{graph of a quadratic}\\ \text{function}$	$\displaystyle \displaystyle f(x) = ax^2 + bx + c \Rightarrow \text{ axis of symmetry is } x = -\frac{b}{2a}$

Topic 3: Geometry and trigonometry

Topic	Description	Formula
$\displaystyle \text{SL 3.1}$	$\displaystyle \text{Distance between two}\\\text{points $(x_1, y_1, z_1)$ and $(x_2, y_2, z_2)$}$	$\displaystyle d = \sqrt{(x_1-x_2)^2 + (y_1-y_2)^2 + (z_1-z_2)^2}$
$\displaystyle \text{SL 3.1}$	$\displaystyle \text{Coordinates of the}\\ \text{midpoint of a line segment}\\ \text{with endpoints $(x_1, y_1, z_1)$} \\ \text{and $(x_2, y_2, z_2)$}$	$\displaystyle \left(\frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2}, \frac{z_1 + z_2}{2}\right)$
$\displaystyle \text{SL 3.1}$	$\displaystyle \text{Volume of a right-pyramid}$	$\displaystyle V = \frac{1}{3}Ah \text{, where } A \text{ is the area of the base, } h \text{ is the height}$
$\displaystyle \text{SL 3.1}$	$\displaystyle \text{Volume of a right cone}$	$\displaystyle V = \frac{1}{3}\pi r^2h \text{, where } r \text{ is the radius, } h \text{ is the height}$
$\displaystyle \text{SL 3.1}$	$\displaystyle \text{Area of the curved surface}\\\text{of a cone}$	$\displaystyle A = \pi rl \text{, where } r \text{ is the radius, } l \text{ is the slant height}$
$\displaystyle \text{SL 3.1}$	$\displaystyle \text{Volume of a sphere}$	$\displaystyle V = \frac{4}{3}\pi r^3 \text{, where } r \text{ is the radius}$
$\displaystyle \text{SL 3.1}$	$\displaystyle \text{Surface area of a sphere}$	$\displaystyle A = 4\pi r^2 \text{, where } r \text{ is the radius}$
$\displaystyle \text{SL 3.2}$	$\displaystyle \text{Sine rule}$	$\displaystyle \frac{a}{\sin A} = \frac{b}{\sin B} = \frac{c}{\sin C}$
$\displaystyle \text{SL 3.2}$	$\displaystyle \text{Cosine rule}$	$\displaystyle c^2 = a^2 + b^2 - 2ab\cos C ; \; \cos C = \frac{a^2 + b^2 - c^2}{2ab}$
$\displaystyle \text{SL 3.2}$	$\displaystyle \text{Area of a triangle}$	$\displaystyle A = \frac{1}{2}ab\sin C$
$\displaystyle \text{SL 3.4}$	$\displaystyle \text{Length of an arc}$	$\displaystyle l = \frac{\theta}{360} \times 2\pi r, \\[1em] \text{where } \theta \text{ is the angle measured in degrees, } r \text{ is the radius}$
$\displaystyle \text{SL 3.4}$	$\displaystyle \text{Area of a sector}$	$\displaystyle A = \frac{\theta}{360} \times \pi r^2, \\[1em] \text{where } \theta \text{ is the angle measured in degrees, } r \text{ is the radius}$

Topic 4: Statistics and probability

Topic	Description	Formula
$\displaystyle \text{SL 4.2}$	$\displaystyle \text{Interquartile range}$	$\displaystyle \operatorname{IQR} = Q_3 - Q_1$
$\displaystyle \text{SL 4.3}$	$\displaystyle \text{Mean, } \bar{x} \text{, of a set of data}$	$\displaystyle \bar{x} = \frac{\sum\limits_{i=1}^k f_ix_i}{n}, \text{ where } n = \sum\limits_{i=1}^k f_i$
$\displaystyle \text{SL 4.5}$	$\displaystyle \text{Probability of an event } A$	$\displaystyle \operatorname{P}(A) = \frac{n(A)}{n(U)}$
$\displaystyle \text{SL 4.5}$	$\displaystyle \text{Complementary events}$	$\displaystyle \operatorname{P}(A) + \operatorname{P}(A') = 1$
$\displaystyle \text{SL 4.6}$	$\displaystyle \text{Combined events}$	$\displaystyle \operatorname{P}(A \cup B) = \operatorname{P}(A) + \operatorname{P}(B) - \operatorname{P}(A \cap B)$
$\displaystyle \text{SL 4.6}$	$\displaystyle \text{Mutually exclusive events}$	$\displaystyle \operatorname{P}(A \cup B) = \operatorname{P}(A) + \operatorname{P}(B)$
$\displaystyle \text{SL 4.6}$	$\displaystyle \text{Conditional probability}$	$\displaystyle \operatorname{P}(A\|B) = \frac{\operatorname{P}(A \cap B)}{\operatorname{P}(B)}$
$\displaystyle \text{SL 4.6}$	$\displaystyle \text{Independent events}$	$\displaystyle \operatorname{P}(A \cap B) = \operatorname{P}(A)\operatorname{P}(B)$
$\displaystyle \text{SL 4.7}$	$\displaystyle \text{Expected value of a}\\ \text{discrete random variable } X$	$\displaystyle \operatorname{E}(X) = \sum x\operatorname{P}(X = x)$
$\displaystyle \text{SL 4.8}$	$\displaystyle \text{Binomial distribution}\\ X \sim \text{B}(n, p)$	$\displaystyle \operatorname{E}(X) = np$

Topic 5: Calculus

Topic	Description	Formula
$\displaystyle \text{SL 5.3}$	$\displaystyle \text{Derivative of } x^n$	$\displaystyle f(x) = x^n \Rightarrow f'(x) = nx^{n-1}$
$\displaystyle \text{SL 5.5}$	$\displaystyle \text{Integral of } x^n$	$\displaystyle \int x^n \,dx = \frac{x^{n+1}}{n+1} + C, \text{ } n \neq -1$
$\displaystyle \text{SL 5.5}$	$\displaystyle \text{Area between a curve}\\ \text{$y = f(x)$ and the $x$-axis,}\\ \text{where } f(x) > 0$	$\displaystyle A = \int_a^b y\,dx$
$\displaystyle \text{SL 5.8}$	$\displaystyle \text{The trapezoidal rule}$	$\displaystyle \int_a^b y\,dx \approx \frac{1}{2}h((y_0 + y_n) + 2(y_1 + y_2 + ... + y_{n-1})), \\[1em] \text{where } h = \frac{b-a}{n}$