Using tables, find the acute angle θ, when:

(i) tan θ = 1.476

(ii) tan θ = 2.91

(iii) tan θ = 0.3

The value of (1 + tan²θ)(1 − sin θ)(1 + sin θ) is:

1. 0

2. 1

3. sec²θ sin²θ

4. cot²θ