Maths
Every maths tool on Brainlag in one place: calculators that show their working, and simulations you can drag, run and check, from GCSE to university.
GCSE
Trig, logs, powers and a history of answers.
Equation SolverLinear, quadratic and simultaneous, with working.
Fractions and PercentagesFractions, percentages and ratios, step by step.
Statistics CalculatorMean, median, SD, quartiles and a box plot.
Unit CircleTurn an angle, see exact sin, cos and tan.
Maths PracticeQuick drills, from arithmetic to algebra.
Straight lines: y = mx + cTwo points make one line. Which?
Quadratic graphs: roots and vertexWhere does the parabola cross?
Graph transformationsWhich way does f(x + 2) move?
Circle theoremsDrag the points. The angles obey.
Probability experimentsRoll it 10 times or 10 000 times
A-Level
Plot functions, sliders, roots, turning points, areas.
Differentiation from first principlesShrink h and watch the chord turn
Integration as the area under a curveMore strips, less error. How much less?
Normal and binomial distributionsShade the area, read the probability
Numerical methods: Newton-Raphson, iteration, bisectionWatch the digits double