IB Maths AA 3.9 Definitions

This page contains our IB Maths AA definitions for 3.9. By learning each one of these definitions, you will fully cover the content for IB Maths AA 'Compound angles'.

All Topic 3 Sub-topics 3.1: Fundamentals Of Geometry 3.2: Introduction To Trigonometry 3.3: Applied Trigonometry 3.4: Circles 3.5: Unit Circle 3.6: Trigonometric Identities 3.7: Trigonometric Graphs (HL)3.8: Advanced trigonometry (HL)3.9: Compound angles (HL)3.10: Vectors (HL)3.11: Lines (HL)3.12: Planes

Compound

Involving a combination of two angles (such as a sum or difference) inside a single trigonometric function, for example $\tan\theta$ where $\theta=A\text{+}B$ or $\theta=A\text{-}B$ .

cosine

A trigonometric function whose derivative is

\frac{d}{dx}(\cos x)=-\sin x

sine

A trigonometric ratio/function that can be expanded for compound angles using $\\sin\left(A\pm B\right)=\sin A\cos B\pm\cos A\sin B$ .

tangent

A line that touches a curve at a point and has the same local slope as the curve there, used to interpret the derivative at that point.

Next Up

You have completed the topic 3 definitions for IB Maths AA - continue with related resources below or explore the full IB Maths AA course from the IBO.

Explored IB Maths AA Definitions?

Get stuck into one of our other subjects!

Other subjects' Definitions

Biology

Chemistry

Physics

Maths AI

Join 85,000 students, across 130+ countries, in 500+ IB schools. That's half of the IB science graduates worldwide.

Start a 7d free trial