If sin θ + cosec θ = 2, then sin³ θ + cosec³ θ is equal to :

1. 2

2. 2 sin θ

3. −2 sin θ

4. 2 cos θ

If cos A + cos² A = 1, then sin² A + sin⁴ A is :

1. 1

2. 2

3. 3

4. 4