Помогите плиз. Приведите к тригонометрической функции острого угла:

1)cos 166°;
2) tg 111°;
3) sin 242°;
4) cos 235°;
5) tg 187°;
6) ctg 215°;
7) sin 312°;
8) cos 326°;
9) cos 306°;
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