6.2 Trig. Functions of Acute Angles Pre-Calculus Next let’s put our angles inside triangles…specifically right triangles. Three Basic Trigonometric Ratios sinside opposite , cosside adjacent to , tanside opposite  hypotenuse hypotenuse side adjacent to  Remember the ratios are used on an acute angle. We memorized . The Reciprocal Ratios: , and 1 1 1 csc sec cot sin cos tan Using the triangle at the right, find all six Example 1: trigonometric functions of the angle . 21 tan = 5 Example 2: 12 , find the remaining trigonometric functions.
6.2 Trig. Functions of Acute Angles Pre-Calculus Next let’s put our angles inside triangles…specifically right triangles. Three Basic Trigonometric Ratios sinside opposite , cosside adjacent to , tanside opposite  hypotenuse hypotenuse side adjacent to  Remember the ratios are used on an acute angle. We memorized . The Reciprocal Ratios: , and csc 1 sin sec 1 cos cot 1 tan Example 1: Using the triangle at the right, find all six trigonometric functions of the angle . 21 Example 2: tan = 5 12 , find the remaining trigonometric functions.