let-r-0-1-and-R-x-R-prove-that-1-1-2-n-1-r-n-cos-1-r-2-1-2r-cos-r-2-2-1-1-2pi-0-2pi-1-r-2-1-2rcos-t-x-r-2-dt- Tinku Tara June 4, 2023 Integration 0 Comments FacebookTweetPin Question Number 35605 by abdo mathsup 649 cc last updated on 21/May/18 letr∈[0,1[andθ∈R,x∈Rprovethat1)1+2∑n=1+∞rncosθ=1−r21−2rcosθ+r22)1=12π∫02π(1−r2)1−2rcos(t−x)+r2dt Terms of Service Privacy Policy Contact: info@tinkutara.com FacebookTweetPin Post navigation Previous Previous post: 4-x-2x-8-2-3-x-3-Find-x-Next Next post: Question-166676 Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Save my name, email, and website in this browser for the next time I comment.