Предмет: Алгебра, автор: ychvlad

Определить знак выражения sin125°×cos275°/tg295°×ctq175°

Ответы

Автор ответа: ATLAS

sin125°×cos275°/tg295°×ctq175°

sin 125°>0, т.к. 125° - угол II четверти

cos 275°>0, т.к. 275° -угол IV четверти

tg295°<0, т.к. 295° - угол IV четверти

ctg175°<0, т.к. 175° - угол II четверти

+*+/-*- >0

Вывод: Знак выражения - плюс

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