Write the value of 3 cot2 θ – 3 cosec2 θ.
Consider 3 cot2 θ – 3 cosec2 θ = – 3(cosec2 θ – cot2 θ)
= – 3(1) (∵ 1 + cot2 θ = cosec2 θ)
= – 3