List the equations shown in the image.

Here are the equations listed from the image:

1. 2sin²x - 5sinx - 7 = 0
2. 12sin²x + 20cos x - 19 = 0
3. 3sin²x + 14sin x cosx + 8cos² x = 0
4. 7 tgx - 10ctgx + 9 = 0
5. 10cos²x + 17cos x + 6 = 0
6. 3cos² x + 10sin x - 10 = 0
7. 2sin² x + 9sin x cos x + 10cos²x = 0
8. 3 tg x - 12ctg x + 5 = 0