title: How can set up 'phase' of this complex equation? (Python)
body: <p>Here're two equations that I'm trying to solve using sympy.</p>
  <pre><code>betat, gammat = symbols('betat, gammat')
  eq1 = Eq(cos(gammat/2),0.83829184+0.j )
  eq2 = Eq(exp(im(i)*betat)*sin(gammat/2),-0.10946281-0.53412048j)
  </code></pre>
  <p>However, the current version doesn't quite work since I don't how can I set up the imaginary unit in <code>exp(im(i)*betat)</code>. How can I set up the <code>i</code> in that equation? Thanks!</p>