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In the space the equation by + cz + d = 0 represents a plane perpendicular to the plane |
YOZ ZOX XOY Z = k |
YOZ |
The equation of YOZ-plane is x = 0 Clearly, planes by + cz + d = 0 and x = 0 are perpendicular as $1 ×0+0×b + 0 × c = 0 $ |
