00Read later0Read MoreHelpLearn Math·Zestyclose_Club3185·about 14 hours ago#QUU0ZU3c#learnmath#redditlearnmath#cauchy#working#exercise+5 more🧰Tag tools✨Add tagI'm working on an exercise about Cauchy sequences, and I don't know how to prove that u_n = sum from k = 1 to n of cos(k)/k! is Cauchy. How should I approach it? submitted by /u/Zestyclose_Club3185 [link] [comments]15s