Maths with Lemon

How the unit circle works

What you have to know:

You must know all the basics about cosx, sinx and tanx properties.
(If not, check this lesson)
You must be able to Rearrange Formulae.
(If not, check this lesson)

Key Points

1. Watch the video:

2. Read this presentation

How to solve trigonometric equations

What you have to know:

The Pythagorean Theorem.

Key Points

1. Watch the video:

2. Solving equation with cosx. Watch the video

Trigonometric identity

What you have to know:

The Pythagorean Theorem.

Key Points

1. Watch the video:

2. Read this presentation

Area of a triangle

What you have to know:

The Pythagorean Theorem.

Key Points

1. Watch the video:

2. Read this presentation

IB Past Paper Problems

Select a topic and unit, then click the button below to get a new problem.

Choose a Topic: Choose a Unit:

Press the button to start!