What do i do when the length of BC(a) is on the opposite side of A (other side of h). I cant find any info about it anywhere. I am not very good at math, so if you can explain it as you would to a child i would appreciate it alot. I understand that cosinus and sinus are cordinates and a button on the calculator, cant figure out what order to press it
Hints:
$48^2 + HC^2 = 107^2$
$\tan 54^\circ = \cfrac{48}{AH}$