How do you determine the quadrant in which -4.254.25 radians lies?

1 Answer
Oct 26, 2017

Consider multiples of piπ written in decimal form.

Explanation:

-4.254.25 is between -piπ, which is roughly -3.14, and -(3pi)/23π2, which is roughly -4.71. Each quadrant has a turn of (3pi)/23π2 so this means we're looking at a value which is in the third quadrant away from zero. We're counting in the clockwise direction as it's negative, so that takes us to the second (i.e. top left) quadrant.