Question

СРОЧНООООО!!!!!!!!Буду благодарен​

Answer 1

$2Cos(frac{pi }{3}-alpha)-sqrt{3}Sin(pi-alpha)+Cosalpha=2(Cosfrac{pi }{3} Cosalpha +Sinfrac{pi }{3} Sinalpha)-sqrt{3}Sinalpha+Cosalpha=2(frac{1}{2}*Cosalpha+frac{sqrt{3}}{2}*Sinalpha)-sqrt{3}Sinalpha+Cosalpha =Cosalpha+sqrt{3}Sinalpha-sqrt{3}Sinalpha+Cosalpha=2Cosalpha$