How can I get the roots in that range?

This question already has an answer here:

  • Find all roots in range 2 answers
  • How to find numerically all roots of a function in a given range? 3 answers

I will make a very simple question. I sought the information, but I did'n find anything.

How can I find the roots between 0 and 20?

I've tried this:

FindRoot[Sin[x], {x, 0, 20}] 

But I did not get what I expected

What is wrong?

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Category: equation solving Time: 2016-07-29 Views: 0

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