tolong bantu dong kakb

jawabannya e.12/13

maaf kalo salah

cot B  = - 5/12
tan B = -12/5 = y/x
r = akarx^2 +y^2
= akar5^2 +12^2
= akar169
= 13
sin B = | y/r | = | -12/ 13| = 12/13