points on the unit circle are in the form (cos0,sin0)
the unit circle is intersected at (5/13,12/13)
cos0=5/13
sec=1/cos, so sec0=13/5
cot=1/tan=cos/sin
sin0=12/13
cot0=(5/13)/(12/13)
cot0=(5/13)(13/12)
cot0=5/12