(sin α+cos ecα)2+(cos α+sec α)2−(tan2α+cot2α) for all values of α is equal to
0
2
4
7
sin2A+cos ec2 α+2+cos2 α+sec2 α+2−tan2 α−cot2α=1+1+cot2α+tan2 α+4−tan2 α−cot2 α=7