7
QuizMultiple Choice
Law of Sines and Law of Cosines — a Deeper Look
Question 7 • Precalculus
In the proof of the Law of Cosines, the equation was created using the Pythagorean theorem. Which equation is a result of expanding ?
Answer
A
square of c = square of h + square of b minus square of x
B
square of c = square of h + square of b minus 2bx + square of x
C
square of c = square of h + square of b + square of x
D
square of c = square of h + square of b minus 2bx minus square of x