Ответ:
tg( п/4) 3 1 sin(п/4) %3 V2/2 сos(п/4)- !! V2/2 sin(-2п/3)=-V3/2 cos(-2п/3)=-1/2
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Ответ:
tg( п/4) 3 1 sin(п/4) %3 V2/2 сos(п/4)- !! V2/2 sin(-2п/3)=-V3/2 cos(-2п/3)=-1/2