i think the answer is a.( -3, -1 )
hello there!
i believe the answer is
(cot2+1)/sec2=cot2
csc2/sec2=cot2
(1/sin2)/(1/cos2)=cot2
(1/sin2)(cos2/1)=cot2
cos2/sin2=cot2
(1/tan2)=cot2
(cot2)=(cot2)
hope this !
hyperz ^_^
a+b=c is your answer