Mark each statement as True or False?
a) The sine rule is used when we are given either a) two angles and one side, or b) two sides and a non-included angle.
b) The cosine rule is used when we are given either a) three sides or b) two sides and the included angle.

a.True

b. True

Step-by-step explanation:

a. #Given two angles and one side

Let the given angles be A° and B° and side x, the angle and two remaining sides can be calculated as:

#Given two sides and one non-included angle.

Let the given angle A°  and sides x and y, the angle  remaining sideand angle can be calculated as:

b.#Given three sides

Let the given sides be a, b and c:

The angles can be calculated as:

#Given  two sides and the included angle

Let the sides given be c, b and the angle A, the remaining sides can be calculated by substituting values in the equation;

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.