В треугольнике ABC угол C равен 90°. BC=2[tex] \sqrt{15} [/tex] , AB= 8. Найдите CosA. Created by dima200214. geometriya-ru

Найдем по теореме Пифагора AC.Ответ: 0,25.

tex] , AB= 8. Найдите CosA...

dima200214 @dima200214

July 2022 1 15 Report

В треугольнике ABC угол C равен 90°. BC=2[tex] \sqrt{15} [/tex] , AB= 8. Найдите CosA

Answers & Comments

Dимасuk

Verified answer

Найдем по теореме Пифагора AC.
$AC = \sqrt{ 8 ^{2}- (2\sqrt{15})^{2} } = \sqrt{64 - 4*15} = \sqrt{4} = 2$
$cosA = \frac{AC}{AB} = \frac{2}{8} = \frac{1}{4} = 0,25.$
Ответ: 0,25.

2 votes Thanks 1

pochemu sovremennye uchenye stali izuchat obonyatelnyj analizatory

Answer

dima200214 July 2022 | 0 Ответы

srochno stoimost bileta v kino byla 1200 rublej posle snizheniya stoimosti

Answer

dima200214 July 2022 | 0 Ответы

na doske napisano chislo nachinayusheesya na 6 esli steret pervuyu cifru to chislo1a6d942a9d44f0dd9ecf62355230c062 44965

Answer

dima200214 July 2022 | 0 Ответы

elektrichka dlinoj 100 metrov edet v 125 raza medlennee chem skoryj poezd dlinoje91f6ef8106913b700a61f517b3a2cfd 73245

Answer

dima200214 October 2021 | 0 Ответы

prochtite tekst ya ochen silyon v sporah sprosite u lyubogo iz moih ostavshihsya dr

Answer

Answers & Comments

Verified answer

pochemu sovremennye uchenye stali izuchat obonyatelnyj analizatory

srochno stoimost bileta v kino byla 1200 rublej posle snizheniya stoimosti

na doske napisano chislo nachinayusheesya na 6 esli steret pervuyu cifru to chislo1a6d942a9d44f0dd9ecf62355230c062 44965

elektrichka dlinoj 100 metrov edet v 125 raza medlennee chem skoryj poezd dlinoje91f6ef8106913b700a61f517b3a2cfd 73245

postavte sushestvitelnye vo mnozhestvennom chisle nephew child man tooth

opredeli obyom vodoroda nu kotoryj proreagiruet s 320 g oksida mediii vy

45 ballov za prostuyu zadachu opredeli massu metana proreagirovavshego s vodoj

prochtite tekst ya ochen silyon v sporah sprosite u lyubogo iz moih ostavshihsya dr

рекомендуемые вопросы

Helpful Links

Helpful Social