1

IIT-JEE 1989

Subjective

+5

-0

Let $$ABC$$ be a triangle with $$AB = AC$$. If $$D$$ is the midpoint of $$BC, E$$ is the foot of the perpendicular drawn from $$D$$ to $$AC$$ and $$F$$ the mid-point of $$DE$$, prove that $$AF$$ is perpendicular to $$BE$$.

2

IIT-JEE 1988

Subjective

+5

-0

Lines$${L_1} = ax + by + c = 0$$ and $${L_2} = lx + my + n = 0$$ intersect at the point $$P$$ and make an angle $$\theta $$ with each other. Find the equation of a line $$L$$ different from $${L_2}$$ which passes through $$P$$ and makes the same angle $$\theta $$ with $${L_1}$$.

3

IIT-JEE 1985

Subjective

+3

-0

One of the diameters of the circle circumscribing the rectangle $$ABCD$$ is $$4y = x + 7$$. If $$A$$ and $$B$$ are the points $$(-3, 4)$$ and $$(5, 4)$$ respectively, then find the area of rectangle.

4

IIT-JEE 1985

Subjective

+5

-0

Two sides of rhombus $$ABCD$$ are parallel to the lines $$y = x + 2$$ and $$y = 7x + 3$$. If the diagonals of the rhombus intersect at the point $$(1, 2)$$ and the vertex $$A$$ is on the $$y$$-axis, find possible co-ordinates of $$A$$.

Questions Asked from Straight Lines and Pair of Straight Lines (Subjective)

Number in Brackets after Paper Indicates No. of Questions

IIT-JEE 2005 (1)
IIT-JEE 2002 (2)
IIT-JEE 2001 (1)
IIT-JEE 2000 (2)
IIT-JEE 1998 (1)
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IIT-JEE 1989 (1)
IIT-JEE 1988 (1)
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IIT-JEE 1984 (1)
IIT-JEE 1983 (3)
IIT-JEE 1980 (1)
IIT-JEE 1979 (1)
IIT-JEE 1978 (3)

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