Since tan = y/x and every (x, y) point in quadrant IV has a positive x-value and a negative y-value, tangent values in quadrant IV are negative; therefore, there are no values of t in quadrant IV that have a tangent value of +1/2.
Since tan = y/x and every (x, y) point in quadrant IV has a positive x-value and a negative y-value, tangent values in quadrant IV are negative; therefore, there are no values of t in quadrant IV that have a tangent value of +1/2.
