If $$ {Acos^{2} +Bsin^{2} }={sin^{2} (sec^{2} +1) over{sec^{2} -1}}$$ and cot =?

If $$ {Acos^{2} +Bsin^{2} }={sin^{2} (sec^{2} +1) over{sec^{2} -1}}$$

1.	If $$ {Acos^{2} +Bsin^{2} }={sin^{2} (sec^{2} +1) over{sec^{2} -1}}$$ and cot =?
A.	$${ sqrt{B-2 over2-A}}$$
B.	$${ sqrt{B-1 over2-A}}$$
C.	$${ sqrt{B-1 over A-2}}$$
D.	$${ sqrt{2-B over 2-A}}$$
Answer» C. $${ sqrt{B-1 over A-2}}$$