Question: plot a unit circle and label different values of t?

hi all! i am **brand new** with maple 13 as well as trigonometry, which i am using the program for. i have figured out how to plot the unit circle with the command:

>plot( [cos(t), sin(t), t=0..2*Pi] );

this renders a very nice little unit circle, which is perfect. however, i want to be able to have little "bars" on the plotted line (ie - perpendicular to the line; "tick marks", if you will) that denote different values of "t". for example, 3 on this line would be very close to (-1,0), which is <img src=; and 6 on the line would be fairly close to (1,0), which is 2*Pi." align="absmiddle"/>

can someone tell me how this can be achieved? if i need to change my unit circle plot equation, I'm fine with that.

also, as a side-note, is there a way to hide the equation so that just the plot shows?




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