This math topic focuses on converting complex numbers from polar form (using radians) to rectangular form. It includes problems that require transforming expressions of the type \( r(\cos(\theta \text{ rad}) + i \sin(\theta \text{ rad})) \) into the form \( a + bi \), where \( r \) is the magnitude, \( \theta \) is the angle in radians, \( a \) and \( b \) are real numbers, and \( i \) is the imaginary unit. The worksheet provides multiple choice answers for each problem, testing the student's ability to accurately perform these conversions.