SEU The sum of the angles of any triangle is 180. The relationship of the length of the sides of a right triangle to the number of degrees in its angles can be expressed as the sine, cosine, or tangent of a particular angle. The sine function is the relationship of the opposite side divided by the hypotenuse. The tangent function is the relationship of the opposite side divided by the adjacent side The cosine function is the relationship of the adjacent side divided by the hypotenuse. The hypotenuse is always the longest side of a right triangle. A simple saying that can be used to help remember the relationship of the trigonometric functions to the sides of a right triangle is Oscar Had A Heap Of Apples. Vectors are lines that indicate both magnitude and direction. Scalars indicate magnitude only. REVIEW QUESTIONS 1. Which trigonometric function is used to find the angle if the length of the hypo- tenuse and of the adjacent side are known? Refer to Figure 15-22 to answer the following questions. 2. If side A has a length of 18.5 ft and side B has a length of 28 ft, what is the length of the hypotenuse? 3. Side A has a length of 12 m, and angle Y is 12. What is the length of side B 4. Side A has a length of 6 in. and angle Y is 45. What is the length of the hypotenuse? 5. The hypotenuse has a length of 65 in., and side A has a length of 31 in. What is angle X? Hypotenus