The law of cosines can only be applied to acute triangles.A.TrueB.False

What does the law of cosines reduce to when dealing with a right triangle?A.The law of sinesB.The formula for a triangle's areaC.The Pythagorean theoremD.The law of cosines cannot be applied to a right triangle

In order to apply the law of cosines to find the length of the side of a triangle, it is enough to know which of the following?A.The lengths of two of the triangle's sides and the measure of the angle between themB.At least two of the angles of the triangle and the length of one of its sidesC.The area of the triangle

If ∠A and ∠B are acute angles such that cos A = cos B, then show that ∠A = ∠B.

Is this statement always, sometimes, or never true?If ∠Y and ∠Z are acute angles in an isosceles right triangle, then cos(Y)=cos(Z).

The Law of Cosines is used to solve triangles in which two sides and the including angle (SAS) are known or those in which three sides (SSS) are known.Group of answer choicesTrueFalse