Question

Sin 2 B= 2 Sin B is true when B is equal to
pls answer the question​

Answer 1

Step-by-step explanation:

sin2B=2sinB

=>2sinBcosB=2sinB

=>cosB=2sinB/2sinB

=>cosB=1

=>cosB=cos0°

=>B=0°

and the general solution of cosB=1 is B=2nπ