(1 + tan θ)² + (1 - tan θ)² is equal to :

1. 2 cosec² θ

2. 2 sec² θ

3. cosec² θ

4. sec² θ

cot⁴ θ + cot² θ is equal to :

1. 2 cot² θ. cosec² θ

2. tan² θ + tan⁴ θ

3. tan² θ.cosec² θ

4. cosec⁴ θ - cosec² θ