Answer :

If curves cut at right angle if 8k2 = 1 then vice versa also true. So, we have to prove that 8k2 = 1 if curve cut at right angles.

If curve cut at right angle then the slope of tangent at their intersecting point satisfies the relation m1m2 = -1


We have to find intersecting point of two curves.


x = y2 and xy = k then and









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