a If is in standard position then the reference angle is the

Last updated: 2/21/2023

a If is in standard position then the reference angle is the acute angle formed by the terminal side of 0 and th Select 3 and that for 8 190 is x axis y axis So the reference angle for 0 110 is b If 0 is any angle the value of a trigonometric function of is the same except possibly for sign as the value of the trigonometric function of 7 So sin 110 sin 190 sin sin and