Question

in triangle ABC angle b=90° , angle a=x° ,angle c=2x° and b=12cm find BC​

Answer 1

Step-by-step explanation:

90+x+2x=180

so x=30°

hence, sin30° = bc/12

bc=6cm

Answer 2

Answer:

90+x+2x=180

3x+90=180

3x=180-90=90

3x=90

x=90/3

x=30