Law of cosines Memes

When the Pythagorean Theorem (a² + b² = c²) just isn't cutting it anymore, mathematicians pull out the big guns! The Law of Cosines is like Pythagoras' sophisticated older sibling who studied abroad and came back with fancy new features. That negative term with the cosine is basically math saying "but wait, there's more!" Perfect for those pesky non-right triangles that refuse to conform to 90° angles. Geometry teachers everywhere are nodding knowingly while students frantically update their cheat sheets.