ПОЖАЛУЙСТА ПОМОГИТЕ СРОЧНО СДЕЛАТЬ ЗАДАНИЕДАЮ 30 БАЛОВ. Created by ylia1off. algebra-ru

ПОЖАЛУЙСТА ПОМОГИТЕ СРОЧНО СДЕЛАТЬ ЗАДАНИЕДАЮ 30 БАЛОВ...

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July 2022 1 1 Report

ПОЖАЛУЙСТА ПОМОГИТЕ СРОЧНО СДЕЛАТЬ ЗАДАНИЕ
ДАЮ 30 БАЛОВ

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blabla22

Ответ:

cos отрицательный, так как угол находится в 3 четверти

$cos\alpha =\sqrt{1-sin^{2}\alpha } = \sqrt{1-\frac{16}{49} } =-\frac{\sqrt{33} }{7} \\tg\alpha =\frac{sin\alpha }{cos\alpha } =\frac{4*7}{7*\sqrt{33} } =\frac{4}{\sqrt{33} } \\ctg\alpha =\frac{cos\alpha }{sin\alpha } =\frac{\sqrt{33}}{4 }$

Объяснение:

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