Предмет: Математика, автор: Dudh

Пусть sin x =3/5, x∈[ pi /2;3 pi /2] . Найдите tg x

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Автор ответа: Матов
0
cosx=sqrt{1-frac{9}{25}}=+-frac{4}{5}\\ cosx=-frac{4}{5}\\ x in [-frac{pi}{2};frac{3pi}{2}]\\ tgx=frac{frac{3}{5}}{-frac{4}{5}}=-frac{3}{4}
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