If a cot θ + b cosec θ = p and b cot θ + a cosec θ = q, then p² − q² is equal to :

1. a² − b²

2. b² − a²

3. a² + b²

4. b − a

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