In each case, given below, find the value of angle A, where 0° ≤ A ≤ 90°.

(i) sin (90° - 3A) . cosec 42° = 1

(ii) cos (90° - A) . sec 77° = 1

The value of sin 23° - cos 67° is :

1. 1

2. 0

3. cos 44°

4. -cos 44°