Assertion (A): If A = 30°, the value of 4 sin A sin (60° - A) sin (60° + A) = 1.

Reason (R): 60° - A = 30° and 60° + A = 90°.

1. A is true, but R is false.

2. A is false, but R is true.

3. Both A and R are true, and R is the correct reason for A.

4. Both A and R are true, and R is the incorrect reason for A.

If 3 cos A = 4 sin A, find the value of :

(i) cos A

(ii) 3 - cot² A + cosec² A