Trigonometry Maths Lessons & Worksheets (GCSE, IGCSE & A-Level)

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This page brings together ready-to-teach trigonometry maths lessons for GCSE / IGCSE and A-Level. Browse the full collection, including right-angled trigonometry, sine and cosine rules, area of a triangle, graphs and transformations, 3D and exact-value work, then identities, equations, reciprocal and inverse functions, radians, modelling and Further Pure t-formulae, with each lesson designed to support clear modelling, independent practice and exam preparation.

  • Ready-to-teach trigonometry lessons
  • Presentations, worksheets and structured practice
  • GCSE / IGCSE and A-Level coverage
  • Scheme of work links for curriculum planning

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Use the sections below to jump straight to GCSE / IGCSE or A-Level trigonometry lessons.
Each resource is designed to reduce planning time and support student progression.

Jump to:  GCSE / IGCSE Trigonometry  |  A-Level Trigonometry

Trigonometry: GCSE / IGCSE

These GCSE / IGCSE trigonometry lessons build from right-angled ratio work through graphs and non-right-angled methods to 3D and exact-value reasoning. Topics include:

  • Introducing sine, cosine and tangent in right-angled triangles; finding unknown lengths and angles; multi-step problems in right-angled triangles
  • Trigonometric graphs: plotting and interpreting sine and cosine graphs, including transformations such as \(y=\sin(ax)\)
  • Area of non-right-angled triangles using \(\frac{1}{2}ab\sin C\)
  • Sine rule and cosine rule for missing lengths and angles
  • Problems with non-right-angled triangles; 3D trigonometry for lengths and angles
  • Exact trigonometric solutions using special triangles; problem solving with trigonometry in harder IGCSE / GCSE contexts

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Ages 14 - 16

3D Trigonometry

Ages 14 - 16

Cosine Rule – Finding Angles

Ages 14 - 16

Cosine Rule – Finding Lengths

Ages 14 - 16

Exact Trigonometric Solutions

Ages 14 - 16

Problem Solving with Trigonometry

Ages 14 - 16

Sine Rule

Ages 14 - 16

Transforming Trigonometric Graphs

Ages 14 - 16

Trigonometrical Graphs

Ages 14 - 16

Trigonometry – Area of Triangles

Ages 14 - 16

Trigonometry Angles in Right-Angled Triangles

Ages 14 - 16

Trigonometry Finding Lengths in Right-Angled Triangles

Ages 14 - 16

Trigonometry Introduction

Ages 14 - 16

Trigonometry Problems with Right-Angled Triangles

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Trigonometry: A-Level

These A-Level trigonometry lessons extend triangle methods into general identities and equations, reciprocal and inverse functions, radian measure, modelling and Further Pure t-formulae. Topics include:

  • Advanced problems with the sine and cosine rules; area of non-right-angled triangles in more demanding contexts; proving trigonometric identities
  • Trigonometric equations, including transformed equations, quadratic-type equations and solving equations using radians
  • Graphing and transforming \(\sin x\), \(\cos x\) and \(\tan x\); harmonic identities in the form \(a\cos x\pm b\sin x\); further identities
  • Secant, cosecant and cotangent; inverse trigonometric functions and identities involving inverses
  • Addition and double-angle formulae; solving equations using double-angle formulae; modelling with trigonometry
  • Radians: converting with degrees; arc length and sector area; solving trigonometric equations in radians
  • T-formulae in Further Pure: deriving and applying t-formulae, proving identities, solving equations and modelling problems

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Preview the collection below. Membership unlocks the downloadable PowerPoint presentations, worksheets and full lesson resources for every product.

Ages 16 +

Area of Non-Right-Angled Triangles

Ages 16 +

Double-Angle Formulae

Ages 16 +

Harmonic Identities

Ages 16 +

Identities with Inverse Trigonometric Functions

Ages 16 +

Introducing Secant, Cosecant and Cotangent

Ages 16 +

Introduction to Radians

Ages 16 +

Introduction to T-Formulae

Ages 16 +

Inverse Trigonometric Functions

Ages 16 +

Modelling with T-Formulae

Ages 16 +

Modelling with Trigonometry

Ages 16 +

More Trigonometric Identities

Ages 16 +

Problems Involving the Cosine Rule

Ages 16 +

Problems involving the Sine Rule

Ages 16 +

Problems with Non-Right-Angled Triangles

Ages 16 +

Proving Trigonometric Identities

Ages 16 +

Radians – Arc Length

Ages 16 +

Radians – Area of a Sector

Ages 16 +

Solving Equations with Radians

Ages 16 +

Solving Trigonometric Equations

Ages 16 +

T-Formulae – Solving Equations

Ages 16 +

T-Formulae Identities

Ages 16 +

Transformed Trigonometric Equations

Ages 16 +

Transforming sin x and cos x

Ages 16 +

Trigonometric Addition Formulae

Ages 16 +

Trigonometric Equations

Ages 16 +

Trigonometric Equations and Identities

Ages 16 +

Using Secant Cosecant and Cotangent

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