Question

It is a question of Trigonometrical Ratios of class 9 iscse. Please solve the question​

Answer 1

Answer:

CA=√144+25=√169=13

using area of triangle

1/2*5*12=1/2*13*BD

BD=60/13

cosDBC=DB/BC=60/13*5=12/13

cosDBA=DB/BA=60/13*12=5/14