Math miscellaneousHard

Question

The angle between the lines 2x = 3y = - z and 6x = - y = - 4z is

Options

A.0o
B.90o
C.45o
D.30o

Solution

Angle between the lines 2x = 3y = - z & 6x = - y = - 4z is 90o
Since a1a2 + b1b2 + c1c2 = 0.

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