NCERT Example 7 - Three Dimensional Geometry

Question: Find the angle between the lines r⃗ = 3î + 2ĵ − 4k̂ + λ(î + 2ĵ + 2k̂) and r⃗ = 5î − 2ĵ + μ(3î + 2ĵ + 6k̂).

Answer: θ = cos⁻¹(19/21).

Full step-by-step NCERT solution with diagrams on Something by Zero.

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