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Math video lesson on duplication formulas in trigonometry. Demonstration of the sine, cosine and tangent duplication formulas, with a simple explanation of how they are used in trigonometry exercises. ???? DOWNLOAD THE FORM IN PDF ???? ???? https://links.supermat.it/formule_gon... ???? GONIOMETRIC FORMULAS PLAYLIST ????♂️ ???? https://links.supermat.it/playlist_fo... ???? SUPERMAT VIDEO LESSONS????♂️ ???? https://supermat.it/videolezioni/ #supermat #mathematics #goniometry -------------------------------------------------------------------- 00:00 ▶︎ Duplication Formulas 01:14 ▶︎ Duplication of the Sine 02:30 ▶︎ Duplication of the Cosine 05:47 ▶︎ Duplication of the Tangent --------------------------------------------------------------------- ✉️ Study with me: ● [email protected] ???? Follow me on: ● Instagram - / supermat.it ● Facebook - / supermat.it ???? Find out who Supermat is: ● https://supermat.it/matteo-bordoni/ ???? Equipment I use for videos: ● iPhone 8 Plus ???? https://amzn.to/31TF5WX ● Rode Wireless GO ???? https://amzn.to/2S9YXiu ● Light Set ???? https://amzn.to/2VP57qo ● Manfrotto Compact Action Smart ▶︎ https://amzn.to/2ZYWICf