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Multiple choice

If the chord y = mx +1 of circle $x^{2}+y^{2}=1$ subtends an angle of measure $45^{0}$ at the major segment of the circle, then vaue of m is:

  1. 2$\pm \sqrt{2}$
  2. -2$\pm \sqrt{2}$
  3. -1$\pm \sqrt{2}$
  4. none of these

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