Question

•In Triangle ABC,/_b=90°,a=30°,AC = 14,then find BC.​

Answer 1

Answer:

angle A = 90° and angle B 30°

=> angle C = 90° - 30° = 60°

=> BC is the hyp = 8 cm long

AC = 8/2 =4cm (sin30° = AC/hp => 8sin30°=AC

AC = 8×1/2 = 4

AB = √(BC^2 - AC^2) = √(8^2 - 4^2) = √(64-16) = 6.93cm

AC = 4 cm

AB = 6.93 cm