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If a normal chord of y^2=4ax subtends an right angle at the vertex of the parabola, then it's slope is equal to? A) +-1 B) +-root2 C) +-2 D) None
If a normal chord of y^2=4ax subtends an right angle at the vertex of the parabola, then it's slope is equal to?A)  +-1 B) +-root2 C) +-2D)  None


2 years ago

kkbisht
90 Points
							the answer is ± $\sqrt{}$2explanation:  Let the normal chord at A( at2,2at) meet the parabola at the point B(at21,2at1) and since $\angle$ AOB=$\pi$/2therefore tt1=-4 and also the condition for t1= -t -2/ttherefore we have  -4/t =-t -2/t ( using tt1=-4 ) => 2/t=t => t2=2 => t= +-$\sqrt{}$2 kkbisht

2 years ago
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• Test paper with Video Solution
• Mind Map
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• NCERT Solutions
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