정답
$c^2 = a^2 + b^2 - 2ab\cos(C)$.
해설
Use the Law of Cosines when two sides and the included angle (SAS) are known, or when all three sides (SSS) are known.
홈 / 라이브러리 / ACT Mastery: English, Math, Reading & Science / AI 플래시카드
What is the law of cosines for a triangle with sides $a, b, c$ and included angle $C$?
덱 'ACT Mastery: English, Math, Reading & Science'의 플래시카드.