In the unit circle, the coordinates (x,y)(x, y)(x,y) represent:
(sintheta,costheta)(\\sin\\theta, \\cos\\theta)(sintheta,costheta)
(costheta,sintheta)(\\cos\\theta, \\sin\\theta)(costheta,sintheta)
(tantheta,cottheta)(\\tan\\theta, \\cot\\theta)(tantheta,cottheta)
(x,y)(x, y)(x,y)