Question A point is in Quadrant-III and on the Unit Circle. If its x-coordinate is -4 / 5, what is the y-coordinate of the point?

a) 3 / 5
b) -3 / 5
c) -2 / 5
d) 5 / 3

Question Find the point on the Unit Circle associated with the rotation -9π/2

a) (0 , -1)
b) (0 , 1)
c) (1 , 0)
d) (-1 , 0)

Question Find the point on the Unit Circle associated with the angle 5π/3

a) (1 / 2 , 1 / 2)
b) (-√3 / 2 , 1/2)
c) (1 / 2 , -√3 / 2)
d) (-√3 / 2 , -1/2)

Question If point (a , b) is on the Unit Circle associated with the rotation t, which of the following is not correct?

a) sin(t) = b
b) cos(t) = a
c) sin(-t) = - a
d) cos(-t) = - a

Question If point (a , b) is on the Unit Circle associated with the rotation t and point (c , d) is also on the Unit circle associated with rotation t + π, then which of the following is correct?

a) c = - a and d = - b
b) c = - a and d = b
c) c = a and d = b
d) c = a and d = - b

Question If point (a , b) is on the Unit Circle associated with the rotation t, then the point on the Unit circle associated with rotation t + π / 2, has the following coordinates