The positional relationship between xcos θ + ysin θ + a = 0 and xcos θ - ysin θ + B = 0 A. Parallel B. vertical C. oblique D. related to the value of a, B, θ D

The positional relationship between xcos θ + ysin θ + a = 0 and xcos θ - ysin θ + B = 0 A. Parallel B. vertical C. oblique D. related to the value of a, B, θ D

c
The slope is just the opposite,