【2026琉球大学】理系　第３問　数C 複素数平面

Thank you as always. I post daily to help with your studies. I try to explain past exam questions that will be useful in the actual entrance exam. Please subscribe to the channel! @chiho_juken This is a classic cosine component of an angle! (2) is a frequently appearing question. Adjust the degree of (1) to find (2). For (3), we want to use the hint. First, combine the numerators. 00:00 Problem Introduction 00:33 (1). Draw a picture. A classic factorization. 02:51 (2). Focus on the degree. 07:13 (3). You can see it if you calculate the numerator. #RyukyuUniversity #UniversityEntranceExamMathematics #UniversityEntranceExamChannelFromRegions #Mathematics #CommonTest #Calculus