Answer: csc -750 = -2
Explanation:
Keep adding 360 to find your reference angle.
-750 + 360 = -390
-390 + 360 = -30
Your reference angle is -30°
csc -30 = 1/sin -30
Remember your unit circle:
sin 30 = 1/2
Because x is cos and y is sin in quadrant 4 sin is -
sin -30 = -1/2
Substitute:
csc -30 = 1/ (-1/2) >Keep change flip
csc -30 = -2
csc -750 = -2