The angle between the planes \(2x+y+z=7\) and \(x-y+2z=9\) is
Answer & explanation
Correct answer: option 2
\(\cos \theta=\left|\frac{A_{1}A_{2}+B_{1}B_{2}+C_{1}C_{2}}{\sqrt{A_{1}^2+B_{1}^{2}+C_{1}^{2}}\sqrt{A_{2}^{2}+B_{2}^{2}+C_{2}^{2}}}\right|\)
The angle between the planes \(2x+y+z=7\) and \(x-y+2z=9\) is
Correct answer: option 2
\(\cos \theta=\left|\frac{A_{1}A_{2}+B_{1}B_{2}+C_{1}C_{2}}{\sqrt{A_{1}^2+B_{1}^{2}+C_{1}^{2}}\sqrt{A_{2}^{2}+B_{2}^{2}+C_{2}^{2}}}\right|\)