Match each expression in 1-3 to its equivalent expression in A-I. Select choice "J" if the equivalent expression is not there.

( )1.tant/(1+sect)

( )2.(tant-cott)/(tant+cott)+2cos²t

( )3.(sin²t-tant)/(cos²t-cott)

Note:Not all of the choices will be used, and some of them may be used more than once.

A.2

B.(1-cost)/sint

C.1

D.-1

E.tant/(1-sect)

F.tan²t

G.cot²t

H.1/(1+tant)

I.-2

J.None of the above