1.

Prove that the straight line (a+b)x+(a−b)y=2ab,(a−b)x+(a+b)y=2ab and x+y=0 form an isosceles triangle whose vertical angle is 2 tan−1(ab).

Answer»

Prove that the straight line (a+b)x+(ab)y=2ab,(ab)x+(a+b)y=2ab and x+y=0 form an isosceles triangle whose vertical angle is 2 tan1(ab).



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