Tolong bantu jawab ya kak Terima kasih

Kalo hafal aturan phytagoras langsung aja!

AC : x = 3

AB : r = 5

BC : y = 4

Cara :

y=√r²-x²

=√5²-3²

=√25-9 =√16=4

y =4

tan A = y/x = 4/3