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Cosine Tangent is a member of The Superfriends. His nickname suggests that he likes trigonometry (Cosine is one of the three trigonometric ratios, along with Sine and Tangent). He is of Asian appearance.
After he and the other Superfriends were informed by Bart of a comet approaching Springfield, they headed by bike on their way to the observatory.
- Episode – "Bart's Comet"
- Episode – "The Bart of War"
- Episode – "The Heartbroke Kid" (Seen at school)
- Episode – "You Kent Always Say What You Want"
- Episode – "24 Minutes" (picture only)
- Episode – "Stealing First Base"
- Episode – "Homer Scissorhands"
- Episode – "The D'oh-cial Network"
- Episode – "The Spy Who Learned Me"
- Episode – "The Fabulous Faker Boy"
- Episode – "Yellow Subterfuge" (Seen at school)
- Episode – "The Man Who Grew Too Much" (Appeared in the hallway)
- Episode – "The Yellow Badge of Cowardge"
- Episode – "Mathlete's Feat"
|Ms. Albright | June Bellamy | Belle | Billy (actor) | Booberella | Colin | Cosine | Crazy Cat Lady | Michael D'Amico | David (Treehouse of Horror XVI) | Devan Woosterfield | Dia-Betty | Mia Farrow | Ginger Flanders | Mrs. Glick | Adil Hoxha | Bernice Hibbert | Cookie Kwan | Lester | Audrey McConnell | Medicine Woman | Mrs. Muntz | Lindsey Naegle | Manjula Nahasapeemapetilon | Opal | Poor Violet | Lois Pennycandy | Pepi | Phillips | Brunella Pommelhorst | Ronaldo (Blame It on Lisa) | Dr. Simpson | Agnes Skinner | Brandine Spuckler | Jitney Spuckler | Whitney Spuckler | Spud | Dolph Starbeam | Clara Stetson | Gino Terwilliger | Dame Judith Underdunk | Veronica | Vicki Valentine | Plopper|