Final answer:
The second quadrant in mathematics is the top left quadrant on a coordinate plane, where the x-coordinate is negative and the y-coordinate is positive.
Step-by-step explanation:
In mathematics, the second quadrant is the top left quadrant on a coordinate plane. In this quadrant, the x-coordinate (a) is negative and the y-coordinate (b) is positive. This means that point (a, b) is to the left of the y-axis and above the x-axis.