Cook said: "We got the win (previously to Burnley) and it bounced us up the league a bit - hopefully this can be the same.
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"The three points haven't come recently but we are delighted with it today and hopefully it can continue."
On the first half, he said: "I think we were all disappointed with how we were playing, but we were not losing so we had the game to take it to them.
"We changed a few things at half-time and tried to be more aggressive.
"We have a lot of attacking options and we see it week-in and week-out at the top - we have the depth."
On winning, he added: "It is massive. We went on a run in the early part of the season and we want to replicate that, the past month has not been the best."