Question

3. In a ABC, angle B = 90° angleA = 30' and
AB =9cm Then, BC = ?​

Answer 1

Answer:

angle A=30°

tan30°=1/√3

tan x=perpendicular/base

therefore;

tan 30°=AB/BC

1/√3=9cm/BC

BC=9cm*√3

=9cm*1.732=15.588 cm

Ans.=15.588 cm