Предмет: Алгебра, автор: blablabla2523

sina + cosa = 1/5
Найти: ctga

Ответы

Автор ответа: Аноним

15

sinx+cosx=1/5

1+2sinxcosx=1/25

sinx+cosx=1/5

sinxcosx=-12/25

по теореме Виета

sinx=-3/5 cosx=4/5 ctgx=cosx/sinx=-4/3

sinx=4/5 cosx=-3/5 ctgx=-3/4

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