The figure above shows the triangle \({ABC}\), where \(∡\) \({ACB=\theta }\).
The points \({A}\) and \({B}\) have respective coordinates \({\left( 0,1 \right)}\) and \({\left( 0,3 \right)}\), while the variable point \({C\left( x,0 \right)}\) lies on the positive \({x}\)-axis.
Show that as \({C}\) varies, the maximum value of \({\theta }\) is \({\frac{\pi }{6}}\).
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