Teaching OSSSC TGT Teachers Mock Test Series 2025 Mathematics Three Dimensional Geometry Angle with Planes
Find the angle between the planes x + 2y + z = 7 and 2x – y + z = 13.
1
\(\theta = {\cos ^{ - 1}}\left( {\frac{1}{6}} \right)\)
2
\(\theta = {\cos ^{ - 1}}\left( {\frac{1}{3}} \right)\)
3
\(\theta = {\cos ^{ - 1}}\left( {\frac{2}{3}} \right)\)
4
\(\theta = {\cos ^{ - 1}}\left( {\frac{3}{4}} \right)\)