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I want to ask that, different values of the argument will satisfy the equation like pi/2,2*pi/3,etc. (sorry I don't have pi (22/7) symbol in my keyboard)
In this situation how will draw the locus because there are infinite points on the number line satisfying the condition . please help

Jean Marie
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Priyanshu Kumar
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    A little remark $22/7=3.142857...$ is only an approximation of $\pi=3.141592...$. – Jean Marie Oct 09 '17 at 06:57
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    It's quite common to not have a $\pi$ button on your keyboard (I think Mac users can get to it with some fancy combination like cmd-alt-p, or something). That is why we use MathJax (see this link), so we just have to write $\pi$ to get it to appear. One can, of course, do more complicated stuff as well: $\sin(x) = \frac{1}{2}$ gives $\sin(x) = \frac{1}{2}$. – Arthur Oct 09 '17 at 06:58
  • isn't that cos(x)=1/2 ?? @JeanMarie – Saketh Malyala Oct 09 '17 at 07:15
  • You are right. I am going to change my remark. – Jean Marie Oct 09 '17 at 07:47
  • (revised remark/answer) : There are an infinity of roots, of two kinds : $x=\pi/6+k 2 \pi$ and $x=5\pi/6+k 2 \pi$ for any positive or negative integer $k$. – Jean Marie Oct 09 '17 at 07:49

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