Question

one who has gave me the answer fast i will mark him brainlist​

Answer 1

LHS=sinα+sinα+2π3+sinα+4π3=sinα+sinα+4π3+sinα+2π3=sinα+2sinα+4π3+α+2π32cosα+4π3-α+2π32=sinα+2sin2α+2π2cosπ/3=sinα+2sinπ+α×1/2=sinα-2sinα×1/2=sinα-sinα=0..