(a) If e is in standard position, then the reference angle 6 is the acute angle formed by the terminal side of 0 and the x-axis. So the reference angle for e = 120° is e = 60°, and that for e = 200° is e = 200(b) If 6 is any angle, the value of a trigonometric function of 6 is the same, except possibly for sign, as the value of the trigonometric function of e. So sin(120°) = sin 60and sin(200°) = -sin 100|× °).Need Help?Read It

Given: The angles θ=120° and θ=200° To find: (a) The reference angles of given angles, (b)…

(a) If ở is in standard position, then the reference angle ở is the acute angle formed by the terminal side of 6 and the x-axcis vy . So the reference angle for 8 = 120° is = 60 V , and that for e= 200° is = 200 (b) If ở is any angle, the value of a trigonometric function of 8 is the same, except possibly for sign, as the value of the trigonometric function of e. So sin(120°) = sin 60 and sin(200) - -sin 100 Need Help? Read it