Question

Хелп. Срочно!!! 10 класс​

Answer 1

$1)Cos(2x+30^{o} )=-1\\\\2x+30^{o}=180^{0}+360^{0}*n,n\in Z\\\\2x=150^{o}+360^{o}*n,n\in Z\\\\x=75^{o}+180^{o}*n,n\in Z$

$2)tg(\frac{x}{4}-15^{o} )=\sqrt{3}\\\\\frac{x}{4}-15^{o}=arctg\sqrt{3}+180^{o}*n,n\in Z\\\\\frac{x}{4}-15^{o}=60^{o}+180^{o}*n,n\in Z \\\\\frac{x}{4}=75^{0} +180^{o}*n,n\in Z\\\\x=300^{o}+720^{o}*n,n\in Z$