4. Take out the first tile. 1  Scrape out the grout from around the first tile you're removing. 2  Use a utility knife to scrape in between the tiles. 3  The first tile is always the hardest to remove since there's no point of entry. 4  Angle a putty knife into the crack where the grout was removed and wedge it underneath a tile.
cosh (mathematical function), hyperbolic cosine, a mathematical function with notation cosh(x) -COSH, a representation of the thiocarboxylic acid functional group in chemistry Chlorpromazine, an antipsychotic drug
As x grows large, cos x just continues to oscillate in [-1,1], so this limit is undefined. Remember that cos x is like the height of a stone in the tread of a tire, varying between [-r,r] above/below the axle. As the wheel turns and x increases, cos x (the height of the stone above the axle) changes and varies. So if the wheel keeps going on to infinity, the stone keeps moving up and down and never settles on any single height. This is the real-world example that shows why the limit is undefined in this case.