Question

9. What is the definition of the Law of Cosines? (1 point)

A line segment drawn from a vertex of a triangle perpendicular to the opposite side

The law stating that the square of a side of a plane triangle equals the sum of the squares of the remaining sides minus twice the product of those sides and the cosine of the angle between them

The value of the ratios of the sides of a right triangle known as sine, cosine, and tangent

The ratio of the side length of a triangle to the sine of the opposite angle of the side is the same for all three sides
10. Which equation for the Law of Cosines? (1 point)

a2=b2+c2−2bccosA



asinA=bsinB=csinC



a2+b2=c2

Answer 1

9. The law stating that the square of a side of a plane triangle equals the sum of the squares of the remaining sides minus twice the product of those sides and the cosine of the angle between them.

10. a² = b² + c² − 2bc cos A