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The equation of the tangent at the point P(t) where t is any parametre to the parabola y^2=4ax is
Dear Pallavi
we know that any point on parabola in parametric form is (at2,2at)
and we know that at any point (x1,y1) on parabola equation of tangent is
yy1 =2a(x+x1)
now put ( at2,2at) in place of x1,y1
y2at = 2a(x+at2)
yt=x+at2
above equation is the equation of tangent
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