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Question 1
The line parallel to the 
and passing through the intersection of the lines 
and 
, where 
, is
and passing through the intersection of the lines and , where , is
Question 2
The straight lines of the family 
(
being parameters) are
( being parameters) are
Question 3
If the foot of the perpendicular from the origin to a straight line is at point 
. Then the equation of the line is
. Then the equation of the line is
Question 4
If the axes are rotated through an angle of 
in the clockwise direction, the coordinates of a point in the new system are 
, then its original coordinates are
in the clockwise direction, the coordinates of a point in the new system are , then its original coordinates are
Question 5
If one of the lines represented by the equation 
is a bisector of the angle between the lines 
, then 
?
is a bisector of the angle between the lines , then ?
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