File:F(x) = cotg(x) + k.gif
![File:F(x) = cotg(x) + k.gif](https://upload.wikimedia.org/wikipedia/commons/thumb/6/61/F%28x%29_%3D_cotg%28x%29_%2B_k.gif/800px-F%28x%29_%3D_cotg%28x%29_%2B_k.gif?20160604220256)
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Original file (1,150 × 583 pixels, file size: 15.02 MB, MIME type: image/gif, looped, 401 frames, 20 s)
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