The signs of the coordinates $(x,y)$ of a point lying in the second quadrant are:

The signs of the coordinates $(x,y)$ of a point lying in the second quadrant are:
  1. $(+,+)$
  2. $(-,+)$
  3. $(-,-)$
  4. $(+,-)$

Solution

Quadrant II lies to the left of the $y$-axis (so $x<0$) and above the $x$-axis (so $y>0$). Hence the signs are $(-,+)$.

Asked in: IMO

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