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Question: How do I veryfy an equation exists

Question:How do I veryfy an equation exists

touchy23 24 Maple
derivative plot graph
March 27 2008
0

Hello,

I have to build a simple procedure that will plot the graph and its tangent, however, i wanna go further and plot the x= (asymptot) if the function does not allow a derivative at a point. For instance, Tan(x) doesn't allow any derivative at Pi/2. I can't use the Showtangent command.
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