If a cot θ + b cosec θ = p and b cot θ + a cosec θ = q, then p2 – q2 =

If a cot θ + b cosec θ = p and b cot θ + a cosec θ = q, then p2 – q2 =

If a cot θ + b cosec θ = p and b cot θ + a cosec θ = q, then p2 – q2 =