If $$sin⁡θ-cosec θ=√2$$​, then the value of  $$sin^3⁡θ-cosec^3 θ$$​ is:  

Correct option is D

than, $$x^3 - \frac{1}{x^3} = K^3 + 3K$$ ​

$$\sin \theta = \frac{1}{\cosec \theta}$$