Question

In which quadrant will the revolving ray lie when it makes the following angles.

(i) 280°

(ii) 390°

(iii) – 400°

(iv) – 1120°

Answer 1

(i) 280° = 3 right angles + 10°

Hence, the position of the revolving ray will be the fourth quadrant.

(ii) 390° = 4 right angles + 30°

Hence, the position of the revolving ray will be in the first quadrant.

(iii) – 400° = – 4 right angles – 40°

Hence, the position of the revolving ray will be in the fourth quadrant.

(iv) – 1120° = -3 x 4 right angles – 40°

Therefore, the position of the revolving ray will be in the fourth quadrant.