Question 919518
Problems containing reference angles/numbers.
t = 9π/4=2π+π/4
rotate cc 2π + an aditional (1/4)π which terminates in quadrant I, making π/4 the reference angle in quadrant I.
..
t = -10π/7=-(π+3π/7)
rotate cw π + an aditional (3/7)π which terminates in quadrant II, making 3π/7 the reference angle in quadrant II.
..
t = 6(radians)
rotate cc 6 radians which terminates in quadrant IV just short of 2π(6.28) radians. The reference angle is then=6.28-6=.28 radians in quadrant IV.
..
t = -7(radians)
rotate cw 7 radians which terminates in quadrant IV. The reference angle is then=7-6.28=.72 radians in quadrant IV.
..
Note:The reference angle is the angle between the terminating side and the x-axis