Tìm đẳng thức đúng? \({\tan ^2}x - {\sin ^2}x = {\tan ^2}x.si{n^2}x.\)

A. \({\tan ^2}x - {\sin ^2}x = {\tan ^2}x.{\cos ^2}x.\)

B. \({\tan ^2}x - {\sin ^2}x = {\cot ^2}x.si{n^2}x.\)

C. \({\tan ^2}x - {\sin ^2}x = {\tan ^2}x.\frac{1}{{{{\sin }^2}x}}.\)

D. \({\tan ^2}x - {\sin ^2}x = {\tan ^2}x.si{n^2}x.\)