Made-Up Trig Functions: Improvisine
improvisine(θ) returns a random number, so it isn't even a function.
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Free for classrooms, worksheets, slides and other non-commercial use under CC BY-NC 4.0, with credit to Ben Orlin.
Cartoon by Ben Orlin, Math with Bad Drawings. https://cartoons.mathwithbaddrawings.com/2015-01-01-made-up-trig-functions--improvisine/ (CC BY-NC 4.0)Transcript
"improvisine(θ) = a random number between −1 and 1" A: "What's improvisine of 60°?" B: "Uh… −0.7." A: "Yesterday you told me it was 0.93!" B: "Well, improvisine(x) ≠ improvisine(x)."