Returns complex number with specified magnitude and phase angle. 
- Template Parameters
 - 
  
    | T | arithmetic type of phase angle  | 
  
   
- Parameters
 - 
  
    | [in] | r | magnitude  | 
    | [in] | theta | phase angle  | 
  
   
- Returns
 - complex number with magnitude and phase angle 
 
Definition at line 52 of file polar.hpp.