MATH 1550 Chapter : Section 6 5 1
Document Summary
Objective 1: understanding the four families of special angles. The general angle definition of the trigonometric functions. 2 sin = y r cos = x r y tan x csc sec x. Objective 3: finding the values of the trigonometric functions of quadrantal angles. Objective 4: understanding the signs of the trigonometric functions. The reference angle, r , is the positive acute angle associated with a given angle . The reference angle is formed by the nearest x-axis and the terminal side of . Below are angles sketched in each of the four quadrants along with their corresponding reference angles. The measure of the reference angle r depends on the quadrant in which the terminal side of c lies. Case 1: if the terminal side of c . Case 2: if the terminal side of c lies in quadrant ii then. Case 3: if the terminal side of c . Case 4: if the terminal side of c lies.
