text: ### Home > PC > Chapter 11 > Lesson 11.2.1 > Problem11-71
  
  11-71.
  1. Find the rectangular form of each complex number. Use exact values! Homework Help ✎
  
  1. z = 6 (cos() + i sin())
  
  2. z = 7 (cos() + i sin())
  
  Substitute the exact values for sine and cosine of 5π/6.
  
  $\textit{z}=6\left( -\frac{\sqrt{3}}{2}+\frac{1}{2}\textit{i} \right)$
  
  Distribute.
  
  $\textit{z}=-3\sqrt{3}+3\textit{i}$
  
  Recall how you graph complex numbers.Where would this point be in the xy-plane?
  
  $\left( -3\sqrt{3},3 \right)$