Question

1-1/2sin^2 2x=7/4sin2x Решить)

Answer 1

$1- frac{1}{2sin^{2}2x}= frac{7}{4sin2x}; 4sin^{2}2x-2=7sin^{2}2x 3sin^{2}2x+2=0 sin^{2}2x=-2/3 sin2x=-sqrt{2/3} 2x=arcsin(- sqrt{2/3})+2 pi n x=arcsin(-sqrt{2/3})/2+ pi n$