Question

Which expression is equivalent to sec2xcot2x?

Answer 1

\[\frac{ 1 }{ \cos ^{2}x }\]
\[\frac{ \cos ^{2}x }{ \sin ^{2}x }\]

Answer 2

multiply them and you get
\[\frac{ 1 }{ \sin ^{2}x }=\csc ^{2}x\]