Let L1: (x – x1)/a1 = (y – y1)/b1 = (z – z1)/c1 and L2: (x – x2)/a2 = (y – y2)/y2 = (z – z2)/c2 are perpendicular or, if a1a2 + b1b2 + c1c2 = 0 - Sarthaks eConnect

Let L₁: (x – x₁)/a₁ = (y – y₁)/b₁ = (z – z₁)/c₁

and L₂: (x – x₂)/a₂= (y – y₂)/y₂ = (z – z₂)/c₂

are perpendicular or, if a₁a₂ + b₁b₂ + c₁c₂ = 0

and parallel if a₁/a₂ = b₁/b₂ = c₁/c₂

Let L₁: (1 – x)/3 = (7y – 14)/25 = (z – 3)/2

and L₂: (7 – 7x)/3p = (y – 5)/1 = (6 – z)/5

If L₁ meets L₂ at right angles, the value of (11p – 64) is

(a) 5

(b) 6

(d) 8

Let L1: (x – x1)/a1 = (y – y1)/b1 = (z – z1)/c1 and L2: (x – x2)/a2 = (y – y2)/y2 = (z – z2)/c2 are perpendicular or, if a1a2 + b1b2 + c1c2 = 0