tan-1-tan-5-tan-9-tan-173-tan-177- Tinku Tara June 4, 2023 Trigonometry 0 Comments FacebookTweetPin Question Number 147651 by iloveisrael last updated on 22/Jul/21 tan1°+tan5°+tan9°+…+tan173°+tan177°=? Commented by mr W last updated on 22/Jul/21 =45 Commented by iloveisrael last updated on 23/Jul/21 istheformulatanα+tan(60°−α)+tan(60°+α)=3tan(3α)correct? Answered by mathmax by abdo last updated on 22/Jul/21 S=tan(π180)+tan(5π180)+tan(9π180)+….+tan(169π180)+tan(173π180)+tan(177π180)S=tan(π180)+tan(5π180)+tan(9π180)+…+tan(π−9π180)+tan(π−5π180)+tan(π−π190)=0 Terms of Service Privacy Policy Contact: info@tinkutara.com FacebookTweetPin Post navigation Previous Previous post: a-word-is-formed-with-3-vowels-and-3-consonants-without-repetition-the-probability-the-formation-of-words-begining-the-letter-z-is-Next Next post: Q-Find-the-number-of-solution-of-thd-equation-tanx-secx-2-cosx-lying-in-the-interval-0-2pi- Leave a Reply Cancel replyYour email address will not be published.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.