1. 7.2 Right Triangle Trigonometry

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

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

9. Reciprocal Identities Quotient Identities

10. c b a

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