3 of the Maths AA glossary’s terms, each with the part of the syllabus where you first meet it.
The event (" or "), containing the outcomes that are in , in , or in both.
The circle of radius 1 centred at the origin. A point on it at angle anticlockwise from the positive -axis has coordinates .
A vector of magnitude 1. The unit vector in the direction of a non-zero vector is .