Question: How to determine if maple evaluates a+0i as a real number


I am doing some work on differential equations, and I am checking the solutions.  Whether the solution is correct or not depends on whether or not a real number plus zero*i is a real number or an imaginary number.  I want to test how maple handles this by plotting sin(x)i. 

This is intended to be a complex plot.  I am expecting a series of points along the real axis where sin(x) is zero.  Can anyone help me with this?


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