Write the ratios for sin A and cos A. The diagram is not to scale

A-B is 12
B-C is 5
C-A is 13
and angle b is a right angle
sin A = 1213
cos A = 512
sin A = 12 over 13 cos A = 5 over 12

sin A = 512
cos A = 513
sin A = 5 over 12 cos A = 5 over 13

sin A = 513
cos A 1213
sin A = 5 over 13 cos A 12 over 13

sin A = 1213
cos A =513