Review question

# Can we express a point in this plane in terms of two parameters? Add to your resource collection Remove from your resource collection Add notes to this resource View your notes for this resource

Ref: R7187

## Question

$A, B, C$ are points of three-dimensional space with coordinates $(1, 0, 3), (-1, -4, 7)$ and $(3, 3, -3)$ respectively.

Find

1. the magnitude of the angle $BAC$;

2. expressions for the coordinates of any point of the plane $ABC$ in terms of two parameters $s$ and $t$.