1. a) 6+ sim² 6° + cos²6º; B) sin 40° - sin 10°; 2. . 4) Розв'язати рiвняння:
a) 2 sin x + √3 = 0;
B) cos 2х- cos 6x = 0;
[tex]ctg ^{2} x - 5ctgx + 4 = 0[/tex]
допоможіть буть ласка ​
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