NCERT Exercise 11.2 Q9 - Three Dimensional Geometry
Question: Find the angle between the following pair of lines: (i) (x−2)/2 = (y−1)/5 = (z+3)/(−3) and (x+2)/1 = (y−5)/(−8) = (z−3)/(−4); (ii) x/2 = y/2 = z/1 and (x−5)/4 = (y−2)/1 = (z−3)/8.
Answer: (i) θ = cos⁻¹(26/(9√38)); (ii) θ = cos⁻¹(2/3).
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