What is an easy way to figure out what quadrant your in when finding reference numbers in pre-cal?

Answer 1

besides the above, you need to memorize the radians, which are all in intervals of pi/2.

I'd strongly suggest memorizing sine, cosine, and tangent for the common reference angles in the first quadrant also. That's 0, pi/6, pi/4, pi/3, pi/2. (0, 30, 45, 60, 90 degrees)

Answer 2

Numbers between 0 and 90: Quadrant 1.
Numbers between 90 and 180: Quadrant 2.
Numbers between 180 and 270: Quadrant 3.
Numbers between 270 and 360: Quadrant 4.
Numbers outside the range 0-360: Add or subtract 360 as many times as needed to get a number between 0 and 360; then consult the above chart.

Is that what you were asking for?