ok so it is asking for you to find sine cosine tangent cotangent etc. for these two places on the unit circle. <as i understand your question>

so we know that the cosine is the best friend of the x part of a coordinate of a point on the unit circle and that the sine is the best friend of the y part of a coordinated of a point on the unit circle so if a point were to be on the x axis and be (1,0) the cosine of that point (which is technically called 2 pi ) would be 1 and the sine would be 0.

using the unit circle we know a few things such as that the positive side of the x axis can be called zero or 2 pi or any multiple thereof, the pos y axis is called (1/2)pi, neg x is called pi, neg y is called (3/2) pi.

from there using the x and y coordinates for cosine and sine and using the trig identities such as tan=sine/cosine to find out the rest

(keep in mind the coordinates for those four either have to be (1,0) (0,1) (-1,0) (0,-1) going counter-clockwise from the pos x axis)