- A triangle is formed by the lines x+y=0 , x-y=0 and lx+my+1=0. If l and m vary subject to the condition l2+m2=1, then the locus of the circumcentre of the triangle is?
(Answer given in the book is (x2-y2)2 = x2+y2)
- A triangle is formed by the lines x+y=0 , x-y=0 and lx+my+1=0. If l and m vary subject to the condition l2+m2=1, then the locus of the circumcentre of the triangle is?
(Answer given in the book is (x2-y2)2 = x2+y2)