Mathematics 9709 · AS & A Level · Vectors

Vectors — practice question

The two planes are given by $3x - y + 2z = 9$ and $x + y - 4z = -1$.

(i)[3]

Find the acute angle formed by the planes.

(ii)[6]

Find a vector equation for the line of intersection of the planes.

Worked solution & mark scheme

This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Find the scalar product of the plane normals” …