Two planes have equations x + 2y − 2 = 7 and 2x + y + 3 = 5.

(i) Calculate the acute angle between the planes.

(ii) Find a vector equation for the line of intersection of the planes.

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- September 6th 2011, 12:15 PMchagerochiAngle between planes and line of intersection of planes.
Two planes have equations x + 2y − 2 = 7 and 2x + y + 3 = 5.

(i) Calculate the acute angle between the planes.

(ii) Find a vector equation for the line of intersection of the planes. - September 6th 2011, 01:08 PMPlatoRe: Vectors help please