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Вопрос по алгебре:
найти значение cosa если значение sin a = -3/5 и относится к 4 четверти-
Автор:
amy
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Ответ:
4/5
Объяснение:
В силу основного тригонометрического тождества квадрат косинуса равен 1-(-3/5)^2=1-9/25=16/25
Абсолютная величина |cos(x)|=4/5
В первой и четвертой четверти косинус положителен. Ответ 4/5
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Choose the right form of the verb in brackets
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a) The number of days in a month ____ (is/are) thirty
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a) Conducting negotiations___ (is/are) the best way to come to an agreement
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a) Either he or his friends ___ (was/were) ready to undertake the responsibility for this work
a) The organization ___ (has/have) lost many members this year.
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a) On Sunday there __ (was/were) a large number of customers at the market.
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a) How many contracts (did/do) our company conclude last month?
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Тело движется по окружности радиусом 5 м со скоростью 40 м/с. Чему равна частота обращения тела (об/с)?
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