Deriving the Law of Cosines

Описание: Where does the Law of Cosines really come from? 🤔
In this video, we’ll derive the Law of Cosines step by step — no memorizing needed!

📐 You’ll see how it connects to the Pythagorean Theorem, and how the extra term with cosine adjusts for non-right triangles.
✅ Understand why c^2 = a^2+b^2 -2abcos(C) makes perfect geometric sense!

Perfect for trigonometry, geometry, or anyone who wants to understand the formula instead of just using it.
#maths #LawOfCosines #Trigonometry #Geometry #algebra #MathShorts #MathExplained #TriangleMath