1-cos2a:sina*cosa*ctga незнаю как решить помогите где деление там должна быть че...

y66 @y66

April 2021 1 9 Report

1-cos2a:sina*cosa*ctga незнаю как решить помогите где деление там должна быть черта

Answers & Comments

Underappreciated

Формулы:

$tga = \frac{sina}{cosa}$

$ctga = \frac{cosa}{sina}$

$cos2a = 2cos^2a-1$

$\frac{1-cos2a}{sinacosactga}=\frac{1-cos2a}{\frac{sinacos^2a}{sina}}=\frac{2-2cos^2a}{cos^2a}=\frac{2(1-cos^2a)}{cos^2a}=2\frac{cos^2a+sin^2a-cos^2a}{cos^2a}=2\frac{sin^2a}{cos^2a}=\2tg^2a$

1 votes Thanks 1

4m 3 14cx sverhu nad cx napisano x 2 15a v kvadrate i snizu u 15 a napisa

Answer

y66 August 2022 | 0 Ответы

ochen nuzhno treshenie segodnya sostavte uravneniya reakcij bef2 be beo beoh2 na2b

Answer

y66 August 2022 | 0 Ответы

pomogite reshit teplovoz proshel 1413 m najdite deametr kolesa teplovoza esli iz

Answer

y66 August 2022 | 0 Ответы

tozhe srochno 1 eshe do polucheniya stronciya v chistom vide ego soli primenyalis v pi

Answer

y66 March 2022 | 0 Ответы

vstavte artikli nuzhno segodnya 1my brother ispupil he goes toschool

Answer

y66 September 2021 | 0 Ответы

pomogite reshit do zavtra 1 skolko razlichn zvukosochetanij mozhno sostav

Answer

y66 September 2021 | 0 Ответы

srochno srochno osushestvit shem prevrashenij n2 nh3 no no2 hno3 nh4no3 i na odnom

Answer

y66 September 2021 | 0 Ответы

Answers & Comments

4m 3 14cx sverhu nad cx napisano x 2 15a v kvadrate i snizu u 15 a napisa

ochen nuzhno treshenie segodnya sostavte uravneniya reakcij bef2 be beo beoh2 na2b

pomogite reshit teplovoz proshel 1413 m najdite deametr kolesa teplovoza esli iz

tozhe srochno 1 eshe do polucheniya stronciya v chistom vide ego soli primenyalis v pi

vstavte artikli nuzhno segodnya 1my brother ispupil he goes toschool

pomogite reshit do zavtra 1 skolko razlichn zvukosochetanij mozhno sostav

srochno srochno osushestvit shem prevrashenij n2 nh3 no no2 hno3 nh4no3 i na odnom

3. p-p2o5-h3po4-ca3(po4)2...

srochno nado reshit takoe zadanie vydany probirki s rastvorom naclna2co3na2so

1 cos2asinacosactga kak reshit neznayu pomogite

рекомендуемые вопросы

Helpful Links

Helpful Social