докажите логарифмическое тождество. Created by wadhack. algebra-ru

докажите логарифмическое тождество...

N777A

$1-tg^{2}\alpha=1-\frac{Sin^{2}\alpha}{Cos^{2}\alpha}=\frac{Cos^{2}\alpha-Sin^{2}\alpha}{Cos^{2}\alpha}=\frac{Cos2\alpha}{Cos^{2}\alpha}\\\\\frac{Cos2\alpha}{Cos^{2}\alpha}=\frac{Cos2\alpha}{Cos^{2}\alpha}$

Тождество доказано

1 votes Thanks 0

Universalka

Verified answer

Объяснение:

$\frac{cos 2a}{cos^2a}=\frac{cos^2a-sin^2a}{cos^2a}= 1-tg^2a$

2 votes Thanks 1

Answers & Comments

Verified answer

zadacha na foto reshite plz

najdite trehznachnoe chislo kratnoe 38 vse cifry kotorogo razlichny a summa kvad

reshite pozhalujsta zadachu ochen nuzhnoc8467133cf879b5f8ac35a8497021c44 87415

igralnuyu kost brasayut dvazhdy najdite veroyatnost togo chto v summe vypadet 30e757929979ea7c219bde9aea677dd7d 76347

netrudnaya zadacha po logarifmam na foto

najdite chetyrehznachnoe chislo kotoroe v 3 raz menshe kuba nekotorogo naturalnog

perila lestnicy dachnogo doma dlya nadyozhnosti ukrepleny poseredine vertikalnym st8557de7e6a3d41e22919cb3a0f0ada18 66474

najdite chetyrehznachnoe chislo bolshee 6000 no menshee 7000 kotoroe delitsya na 9

vzyali neskolko dosok i raspilili ih vsego sdelali 36 poperechnyh raspilov v it

tex]...

рекомендуемые вопросы

Helpful Links

Helpful Social