Question 1083096
It's a right triangle with sides a = 5, b = 12 & c = 13.
------
Angle C is the right angle = 90 degs.
sin(C) = 1
cos(C) = 0
----------
Angle A is the smallest angle opposite side a.
sin(A) = 5/13
cos(A) = 12/13
---------
Angle B is the angle opposite side b.
sin(B) = 12/13
cos(B) = 5/13
======================
For all angles, 
tan = sin/cos
cot = 1/tan
sec = 1/cos
csc = 1/sin