the complementary strand would be 5' TACGGGCCCACAGCATCAACT3'
the complementary strand would be this sinceyoujust switch the letter in the strand out for its pair when looking for a comlementry strand
so for reference heres a little cheat guide
Adenine=Thymine
Thymine=Adenine
Guanine=Cytosine
Cytosine=Guanine
