Cos 10п/3+sin150 2sin(7п/2-а)-5cos(17п-а) -5cos(5п/2+а)+2sin(12п-а) - вопрос №6503057103150272517552212 от fedorinovkirs 02.10.2020 17:36

Question

Алгебра: Cos 10п/3+sin150 2sin(7п/2-а)-5cos(17п-а) -5cos(5п/2+а)+2sin(12п-а)

fedorinovkirs · Answer

Cos(3π+π/3)+sin(180-30)=-cosπ/3+sin30=-1/2+1/2=02sin(2π+(3π/2-a))-5cos(16π+(π-a))=-2cosa+5cosa=3cosa-5cos(2π+(π/2+a))+2sin(-a)=5sina-2sina=3sina...