If the common chord of the circles `x^2 + (y - 2)^2 = 16` and `x^2 + y^2 = 16` subtend a angle at the origin then `lambda` is equal to

If the common chord of the circles x^(2) + ( y -lambda)^(2) =16 and x^(2) +y^(2) =16 subtend a right angle at the origin then ' lambda' is equal to :

If the common chord of the circles x^(2) + ( y -lambda)^(2) =16 and x^(2) +y^(2) =16 subtend a right angle at the origin then ' lambda' is equal to :

The common chord of the circles x^2 +y^2-4x-4y=0 and x^2 +y^2=16 subtends at the origin an angle equal to

(A) Number of values of a for which the common chord of the circles x^2+y^2=8 and (x-a)^2+y^2=8 subtends a right angle at the origin is

(A) Number of values of a for which the common chord of the circles x^(2)+y^(2)=8 and (x-a)^(2)+y^(2)=8 subtends a right angle at the origin is

The common chord of the circles x^(2)+y^(2)-4x-4y=0 and 2x^(2)+2y^(2)=32 subtends at the origin an angle equal to

The common chord of x^2 + y^2 - 4x - 4y = 0 and x^2 + y^2 = 16 substends at the origin an angle equal to

The common chord of x^2 + y^2 - 4x - 4y = 0 and x^2 + y^2 = 16 substends at the origin an angle equal to