Найдите сторону BC треугольника ABC если AB=2√3 AC=4 A=30 градусов. Created by Heavsh. geometriya-ru

По теореме косинусов:Ответ: 2 ед.

Найдите сторону BC треугольника ABC если AB=2√3 AC=4 A=30 градусов...

Heavsh @Heavsh

July 2022 1 175 Report

Найдите сторону BC треугольника ABC если AB=2√3 AC=4 A=30 градусов

Answers & Comments

Banabanana

Verified answer

По теореме косинусов:

$\tt BC=\sqrt{AB^2+AC^2-2\cdot AB\cdot AC\cdot\cos A} =\\\\{} \ \ \ =\sqrt{(2\sqrt{3})^2+4^2-2\cdot2\sqrt{3}\cdot4\cdot\cfrac{\sqrt{3}}{2}} =\\\\{}\ \ \ =\sqrt{12+16-24}= \sqrt{4} =2$

Ответ: 2 ед.

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glavnye chleny predlozhenij9f7c7ea257f10db13c5614f851623bc7 59687

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Heavsh July 2022 | 0 Ответы

Answers & Comments

Verified answer

glavnye chleny predlozheniya vypisat 1otdyhayushim vertoletnye ploshadki v parkah n

glavnye chleny predlozhenij9f7c7ea257f10db13c5614f851623bc7 59687

stoit terem teremok iz 5 etazhejkazhdyj etazh mozhno pokrasit v sinij ili krasnyjc0542e81ae83655f457237639c0988fb 92415

skolko sushestvuet chetyryohznachnyh chiselvse cifry kotoryh razlichny i nechyotny

stoit terem teremok iz 5 etazhejkazhdyj etazh mozhno pokrasit v sinij ili krasnyj

biatlonist mihail pozyomkin 5 raz strelyaet po mishenyamveroyatnost popadaniya pri o

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