If two lines represented by `x^4+x^3y+c x^2y^2-x y^3+y^4=0` bisect the angle between the other two, then the value of `c` is (a) `0` (b) `-1` (c) 1 (d) `-6`

If the angle between the two lines represented by 2x^(2)+5xy+3y^(2)+6x+7y+4=0 is tan^(-1)(m), then find the value of m.

Let x , y be two variables and x >0, x y=1 , then minimum value of x+y is (a) 1 (b) 2 (c) 2 1/2 (d) 3 1/3

If 2x+y-4=0 is bisector of the angle between the lines a(x-1)+b(y-2)=0,c(x-1)+d(y-2)=0 then other bisector is

If the angle between the two lines represented by 2x^(2)+5xy+3y^(2)+6x+7y+4=0 is tan^(-1)(m) , then m is equal to

If the operation ^^ is defined by the equation x^^y=2x+y , what is the value of a in 2^^a=a^^3? (a) 0 (b) -1 (c) 1 (d) 4

The angle between the lines 2x=3y=-z and 6x=-y=-4z is (A) 0^0 (B) 90^0 (C) 45^0 (D) 30^0

If two sides of a triangle are represented by 2x-3y+4=0 and 3x+2y-3=0 , then its orthocentre lies on the line : (A) x-y+ 8/15 = 0 (B) 3x-2y+1=0 (C) 9x-y+9/13 = 0 (D) 4x+3y+5/13=0