The phrase "appreciate your cooperation" is correct and can be used in written English. It can be used when you would like to thank someone for working with you on a project or task. For example: "Thank you so much for helping me complete the assignment. I really appreciate your cooperation.".
I appreciate your cooperation".
We appreciate your cooperation.
In the UK text, for example, Mitchell writes at one point that: "Historians still unborn will appreciate your cooperation in the future, Sonmi ~451.
The only thing we ask is that you DO NOT post any hints or give away any answers or solutions until the contest closes on Tuesday, Oct. 23 at 6 p.m. Please feel free to discuss non-thematic parts of the puzzle that you liked or weren't that crazy about, but we appreciate your cooperation in not spoiling the fun for others.
I very much appreciate your offer of cooperation around the many areas of common concerns we share".
Cooperation between the UAE [United Arab Emirates] and UNICEF dates back to the early seventies, and we highly appreciate your friendship and cooperation," Sultan Bin Sulayem told a gathering of UNICEF Representatives.
I would wholeheartedly appreciate your continued support and cooperation.
Awesome tool! I started using it one year ago and I never had to look for another app
Ha Thuy Vy
MA of Applied Linguistic, Maquarie University, Australia