Question

Помогите пожалуйста! 2cos^2(45+3α)+sin6α=1

Answer 1

$2cos^2{45+3alpha}-1-sin{6alpha}=0$
$cos{90+6alpha}-sin{6alpha}=0$
$-sin{6alpha}-sin{6alpha}=0$
$sin{6alpha}=0$
$6alpha=picdot{k}, kinmathbb{Z}$
$alpha=frac{picdot{k}}{6}, kinmathbb{Z}$