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Консультация № 188666
18.01.2016, 21:37
0.00 руб.
0
3
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Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
верно ли утверждение, что tg(460)>=0?
по моему решению это верно, т.к. преобразовав у меня получилось, что ctg(10)>=0 (Это верно, подскажите, пожалуйста?)
верно ли утверждение, что tg(460)>=0?
по моему решению это верно, т.к. преобразовав у меня получилось, что ctg(10)>=0 (Это верно, подскажите, пожалуйста?)
Обсуждение
18.01.2016, 21:41
общий
18.01.2016, 22:03
Адресаты:
Имеется в виду 460 угловых градусов или 460 радиан? При помощи, например, калькулятора в OC Windows7 можно установить, что
tg 460=4,028...>0,
tg 460[$186$]=-5,671...<0.
Об авторе:
Facta loquuntur.
Facta loquuntur.
18.01.2016, 21:45
общий
18.01.2016, 21:45
Если в градусах, то это неверно tg(460)=tg(100)=tg(90+10)=-сtg(10)<0 100 градусов это вторая четверть, а там тангенс отрицательный. Вы забыли при использовании формул приведения использовать правило знака
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