question_answer

If \[Co{{t}^{2}}\theta ={{a}^{2}}-1,\] then the value of Cosec \[\theta \] + \[\mathbf{Co}{{\mathbf{t}}^{\mathbf{3}}}\]\[\theta \] Sec\[\theta \] is ________

A)  \[{{\left( {{a}^{2}}-1 \right)}^{3/2}}\]                                                

B)  \[{{a}^{2}}-1\]       

C)  \[{{a}^{3}}\]             

D) \[{{a}^{2}}\]

E) None of these