. m1(x plus a) and (y minus b) is equal to m1 (x plus a) are tangents
m1(x + a) and (y – b) = m1(x + a) are the tangents of m1= 4ax, then
Best Answer
Correct Option is : (C)
Solution :
Solution. Clearly, both the lines pass through (-a, b) which is a point lying on the directrix of the parabola.
Thus, m1m2= -1.
Because tangents drawn from any point on the directrix are always mutually perpendicular.
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