Can You Solve These? Complex Numbers, Geometry & Trigonometry | Problems 12–14 Lecture 28 CX

In this video, we solve Problems 12, 13 and 14 on Complex Numbers, combining algebra, geometry and trigonometry in several challenging applications. 📌 Problems covered: Problem 12: Complex numbers and geometry — proving a triangle is right isosceles and constructing points using complex affixes. Problem 13: Trigonometric and exponential forms, modulus and argument, equilateral triangles, and finding the exact values of cos(7π/12) and sin(7π/12). Problem 14: Euler’s formula, conjugates, trigonometric identities, and linearization of powers/products of sine and cosine. 🎓 Topics: Complex Numbers • Argand Plane • Modulus & Argument • Trigonometric Form • Exponential Form • Euler’s Formula • Geometry • Equilateral & Isosceles Triangles • Trigonometric Identities • Linearization 📚 More lectures, exercises and PDFs: Check the CentroidX lecture resources linked in the channel description. If you enjoy mathematical problem solving, subscribe to CentroidX and follow the full Complex Numbers series. #ComplexNumbers #Mathematics #CentroidX #MathProblems #EulerFormula #Trigonometry #MathematicalProblemSolving