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# help

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The number $$\text{cis } 75^\circ + \text{cis } 83^\circ + \text{cis } 91^\circ + \dots + \text{cis } 147^\circ$$ is expressed in the form $$r \, \text{cis } \theta$$, where $$0 \le \theta < 360^\circ$$. Find $$\theta$$ in degrees.

Dec 20, 2019