Q.

Slope of a line L  is 1. The points on the line L at a distance of 2 units from the point 32,32 which lies on the line L are

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a

42,42,22,22

b

42,42,−22,−22

c

−42,−42,22,22

d

42,−42,−22,22

answer is A.

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Detailed Solution

The inclination of the line L is θ=tan−11=π4The coordinates of a point on the line  L at a distance of r  units from x1,y1 are x=x1±rcosθ and y=y1±rsinθ here θ  is inclination of the line θHence the required coordinates are x=x1±rcosθ=32±212=32±2=42,22and y=y1±rsinθ=32±212=32±2=42,22Therefore, the required points are 42,42,22,22
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Slope of a line L  is 1. The points on the line L at a distance of 2 units from the point 32,32 which lies on the line L are