Trigonometry "Sine & Cosine Angle Sum Identities Trigonograph" printable educational poster, Math wall art
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The diagram that made me Wikipedia-famous(-ish)!
A "trigonograph" is a diagram that illustrates a trigonometric principle, ideally making it obvious. The subject of this poster does this for the Angle-Sum Identities for Sine and Cosine.
It must work as intended, since someone posted my work to the Wikipedia "List of trigonometric identities" page: ( https://en.wikipedia.org/wiki/List_of_trigonometric_identities#Angle_sum_and_difference_identities ). Now it can be posted to your wall!
Posters in the Trigonograph series:
• "The Fundamental Trigonograph" ( https://www.etsy.com/listing/788311128/trigonometry-the-fundamental )
• "The Six Similar Right Triangles in the Fundamental Trigonograph" ( https://www.etsy.com/listing/789398860/trigonometry-the-six-similar-right )
• "The Sine & Cosine Angle Sum Identities Trigonograph" (this listing)
• "The Law of Cosines Trigonograph" ( https://www.etsy.com/listing/810381228/trigonometry-law-of-cosines-trigonograph )
• "The Law of Sines Trigonograph" ( https://www.etsy.com/listing/824368895/trigonometry-law-of-sines-trigonograph )
Price:$3.14
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