Решить:sin530 градусов - cos 22π/9
sin530=sin(360+170)=sin170=sin(180-10)=sin10=sin(П/18)
cos22п/9=cos(2П+4П/9)=cos(4/9П)=cos(П/2-П/18)=sin(П/18)
ответ 0
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sin530=sin(360+170)=sin170=sin(180-10)=sin10=sin(П/18)
cos22п/9=cos(2П+4П/9)=cos(4/9П)=cos(П/2-П/18)=sin(П/18)
ответ 0