Решите неравенство: sin^x<1/4
Sin²x<1/4
(1-cos2x)/2<1/4
1-cos2x<1/2
cos2x>1/2
-π/3+2πn<2x<π/3+2πn
-π/6+πn
Оцени ответ
Sin²x<1/4
(1-cos2x)/2<1/4
1-cos2x<1/2
cos2x>1/2
-π/3+2πn<2x<π/3+2πn
-π/6+πn