Q.

(A) : The locus of the point of intersection of perpendicular tangents to y2 = 4ax is its directrix 

(R):If θ is the angle between the pair of tangents draw from (x1,y1) to parabola  S = 0 then tanθ = S11x1+a

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a

A is false, R is true  

b

A and R are true and R is not  the correct explanation of A.  

c

A and R are true and R is the correct explanation of A.   

d

A is true, R is false  

answer is A.

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Detailed Solution

 The locus of the point of intersection of perpendicular tangents to the parabola is a directrix

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