cos ( [tex]\frac{3\pi }{2}[/tex] + [tex]\alpha[/tex] ) = [tex]\frac{\sqrt{2}}{2}[/tex] Решите пожалуйста!!!. Created by wadhack. algebra-ru

tex] Решите пожалуйста!!!...

Verified answer

$Cos(\frac{3\pi }{2}+\alpha)=\frac{\sqrt{2} }{2}\\\\Sin\alpha=\frac{\sqrt{2} }{2}\\\\Cos2\alpha=1-2Sin^{2}\alpha=1-2*(\frac{\sqrt{2} }{2})^{2}=1-2*\frac{1}{2}=1-1=0$

2 votes Thanks 1

taisasnitko

Ответ:0.

Объяснение:cos(3π/2+α)=√2/2;

sinα=√2/2,т.к. по формулам приведения cos(3π/2+α)=sinα

cos2α=1-2sin²α=1-2(√2/2)²=1-2·2/4=0.

1 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