The French international missed a crucial late chance in the Gunners' 2-1 defeat against Chelsea on Saturday, but believes that he will come good if he continues to get in the right positions.
Giroud told the club's official website: "It was a good pass from Alex Oxlade-Chamberlain and I think that I needed to go round the keeper as he came out quickly.
If I chipped the ball, the defender could have saved it. So I think I made the right call.
"I scored in midweek [against Coventry] and it was really good for me to score. I will keep working hard to score goals."
The 26-year-old faces stiff competition from Gervinho to start Arsenal's next match, a midweek Champions League game at home to Olympiakos.