Question

if sin teta + 2cos teta=1 prove that 2sin teta + cos teta = 2

Answer 1

sin teta + 2 cos teta = 1
sin teta = 1 - 2 cos teta
LHS
2 sin teta + cos teta = 2 ( 1 - 2 cos teta ) + cos teta
= 2 - 4 cos teta + cos teta
= 2 - 3 cos teta.
but i got this answer.