Question

If a=1 b=√3 and A=30 , find the value of the angle B

Answer 1

Answer:

In,ΔABCsinAa=sinBb=sinCc⇒sin30oa=sinB3=sinC1⇒1/2a=sinB3⇒2a=sinB3⇒sinB=2a3=23=sin60o⇒B=60ocosA=2bcb2+c2−a2⇒cos30o=2.3