cos-A-cos-B-cos-C-1-r-R- Tinku Tara June 4, 2023 Trigonometry 0 Comments FacebookTweetPin Question Number 21267 by oyshi last updated on 18/Sep/17 $$\mathrm{cos}\:{A}+\mathrm{cos}\:{B}+\mathrm{cos}\:{C}=\mathrm{1}+\frac{{r}}{{R}} \\ $$ Terms of Service Privacy Policy Contact: info@tinkutara.com FacebookTweetPin Post navigation Previous Previous post: b-2-c-2-tan-A-c-2-a-2-tan-B-a-2-b-2-tan-C-0-Next Next post: Question-86802 Leave a Reply Cancel replyYour email address will not be published.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.