Cos(360-15) + sin(270+15) - sin(450-4*15)
= Cos(345) + sin(285) - sin(390)
= -sqrt(2)/2 + sqrt(2)/2 - (-1)
= -sqrt(2)/2 + sqrt(2)/2 + 1
= 1
Ответ: 1.
Cos(360-15) + sin(270+15) - sin(450-4*15)
= Cos(345) + sin(285) - sin(390)
= Cos(345) + sin(285) - sin(390)
= -sqrt(2)/2 + sqrt(2)/2 - (-1)
= -sqrt(2)/2 + sqrt(2)/2 + 1
= 1
Ответ: 1.