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Trig. Day 2 Pre-Calc. for AP Prep. Date: ______ Warm Up 1) Identify which trig. functions are positive in which quadrants. 2) Define the following trig. functions in terms of sine and cosine tan A 3) sec A csc A Find the value of the other trigonometric functions if: sin 5 , 270 360 13 cot A Trig. Day 2 Pre-Calc. for AP Prep. Date: ______ Goal: To use reference angles and quadrants to develop a feel for trigonometric functions of special and general angles. to connect special right triangles to the unit circle. I. Evaluating trigonometric functions without a calculator. Angles with major angles as reference angles. 1. Determine the position (reference angle and quadrant) of the terminal side. 2. Consider the length of the side opposite the reference angle or adjacent to it and the definition of the trigonometric function to find the value of the function. 3. Consider the quadrant when determining whether a trigonometric function is positive or negative. For quadrantal angles we need to remember the following: 2 0 3 2 2 sinx cosx tanx Evaluate the following using the process described above. Leave answers in simple radical form if necessary. 11 4 1) sin(570 ) 2) cos 4) sec(90 ) 5) csc(-270 ) 3) cot 7 6 6) sin(-750 ) 7) cot 15 6 8) cos CW: Day 2 CW WS HW: Unit Circle Practice WS 27 6 9) sec 11 4