Ответ:
-cos(120°)=1/2
объяснения:
sin(150°)=1/2
cos(120°)=-1/2
-cos(120°)=1/2;
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Ответ:
-cos(120°)=1/2
объяснения:
sin(150°)=1/2
cos(120°)=-1/2
-cos(120°)=1/2;