Revision coverage
Topic checklist
Use this as a revision index. Each card gives the skills to practise, common traps, and a clean generic example style.
f
Function language
Domain, range, maximal domain, restricted domain, interval notation, endpoint labels, full function notation, and interpreting graphs.
- State mappings as , .
- Check whether endpoints are open or closed.
- For inverses, swap domain and range after confirming the function is one-to-one on its stated domain.
sin
Circular functions
Exact values, radians and degrees, signs by quadrant, period, transformations, solving trigonometric equations, and sketching one or more cycles.
- Know the unit-circle values for .
- For , amplitude is and period is .
- For tangent, period is ; vertical asymptotes matter.
T
Transformations and inverses
Translations, reflections, dilations from axes, transformed rules, inverse rules, inverse domains, and graph-to-rule reasoning.
- Horizontal changes happen inside the function and often feel reversed.
- When finding an inverse, write , swap and , then solve for .
- Transformations can change the domain and range; update both.
x2
Quadratics and optimisation
Vertex form, intercept form, discriminants, parameter conditions, modelling, maximum and minimum values, and domain restrictions.
- : two, one, or no real x-intercepts.
- Use vertex form when maximum or minimum information is given.
- For optimisation, state the variable, rule, domain, and final value in context.
{ }
Piecewise and hybrid functions
Building functions over adjacent domains, graphing endpoints, avoiding overlap, and combining linear, quadratic, circular, or rational sections.
- Every piece needs its own rule and interval.
- Intervals should cover the intended path without gaps or double-counting endpoints.
- Use clear endpoint notation on sketches and in written function definitions.
1/x
Rational and root functions
Asymptotes, intercepts, reciprocal transformations, square-root domains, distances between points, and sketch features.
- Denominators cannot be zero.
- Square-root inputs must be non-negative unless the domain is already restricted.
- Sketches should label intercepts, endpoints, asymptotes, and key transformed points.
Pr
Probability
Complements, unions, intersections, tree diagrams, conditional probability, at least statements, and repeated independent trials.
- .
- , where .
- Translate "at least" by adding cases or using the complement.
xy
Coordinate geometry and algebra
Distance, midpoint, gradients, equations of lines, solving equations exactly, and using algebra to support graph features.
- Distance: .
- Point-gradient form: .
- Keep exact values unless a question clearly asks for a decimal.