Question

Дано:
ΔABC;
∠С=90°
∠В=49°
BC=9 см
Найти:AC

Answer 1

∠A = 180-90-49=41
BC/sin∠A = AC/sin∠B
AC = 9*sin49/sin41 = 9*0.7547/0.6561 = 10,35253772290809