Which property can be justified using the ratios in triangle cab ?
a)sin b = cos (90^o + b)
b)cos a = sin (90^o - b)
c)cos b = sin (90^o - b)
d)tan a = sin b/cos a

I think you forgot to give the diagram of the triangle along with the question. I am answering the question based on my knowledge and research. "cos B = sin (90^o - B)" is the one property among the following choices given in the question that can be justified using the ratios in triangle CAB. The correct option among all the options that are given in the question is option "C".