To find what quadrant 14rad is, it is easier to convert it first to degrees.
So,
1 rad = 180°/π
14 x 180°/π=802.14°
Since a circle’s complete angle is 360°, and our value is more than 360°, reduce the angle until it is lesser than or equal to 360° by subtraction.
So,
802.14° – 360° = 442.14°
442.14° – 360° = 82.14°
A circle is divided into 4 quadrants, adding up 90° with each incrementing quadrant, with quadrant 1 limited to 0° to 90°. Since the simplified angle is 82.14°, it falls under quadrant 1.