If the chord $x+y=1$ of the circle $x^2+y^2=a^2$ subtends a right angle at the origin, then $a=$

If the chord $x+y=1$ of the circle $x^2+y^2=a^2$ subtends a right angle at the origin, then $a=$
  1. 4
  2. $\sqrt{2}$
  3. 1
  4. 2

Solution

No solution. Refer to answer key.

Asked in: AP EAMCET 2017 (26 Apr Shift 2)

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