Question

maths trignometry trignometry​

Answer 1

In triangle ABC,

BD is the height

Therefore by pythagoras theorem,

$ac^{2} = bc^{2} + ab^{2} \\ ac ^{2} = 12 ^{2} + 5 {}^{2} \\ ac^{2} = 144 + 25 = 169 \\ ac = 13$

SINalpha=opposites side / hypotenuse

=BC /AC

=5/13

Answer 2

Answer:

5/13

Step-by-step explanation: