Identify 4 points on the graph of y = tan x with 0<=x<=π/2

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We can find infinetly many points on this graph. For example

x=0 => tan0=0

**(0,0)**

x=Pi/6 => tan (Pi/6)=`sqrt(3)/3~~0.58`

**(0.52,0.58)**

x=Pi/4~0.785 => tan (Pi/4)=1

**(0.785,1)**

x=Pi/3 => tan(Pi/3)=`sqrt(3)~~1.73`

**(1.046,1.73)**

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