1. Announcements Test Friday, material through 6.2 (today) Sample test posted Bring picture ID You can use the Windows calculator, your own calculator, or the grapher from Lab 2. You can’t use the book, your notes, online notes, email, or AIM

2. A triangle in which one angle is a right angle is called a right triangle. The side opposite the right angle is called the hypotenuse, and the remaining two sides are called the legs of the triangle. c b a

3. Initial side Terminal side

4. a b c

5. The six ratios of a right triangle are called trigonometric functions of acute angles and are defined as follows: Function nameAbbreviationValue

6. Find the value of each of the six trigonometric functions of the angle Adjacent 12 13 c = Hypotenuse = 13 b = Opposite = 12

8. c b a

9. Theorem Complementary Angles Theorem Cofunctions of complementary angles are equal.