Решите тригонометрические уравнения:

1. 6sin²x - 7sinx - 5 = 0

2. 3sin²x + 10 cosx - 10 = 0

3. 2sin²x + 11sinx*cosx + 14cos²x = 0

4. 3tg x - 5ctg x + 14 = 0

5. 10sin²x - sin2x = 8cos²x

6. 1 - 6cos²x = 2sin2x + cos2x

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