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1) 2arcsin (-[tex] \frac{ \sqrt{3} }{2} [/tex]) + arctg (-1) + arccos (-[tex] \frac{ \sqrt{2} }{2} [/tex]

2) cosx= [tex] \frac{\sqrt{3} }{2} [/tex]

3)2sinx + √3=0

4) √3ctgx-1=0

5) 2sin ( [tex] \frac{π}{3} - \frac{x}{4} [/tex] ) =√3

6) 6cos²x+cosx-1=0

7)sinx+cosx=1

8)sin(2π-x)-cos([tex] \frac{3π}{2} [/tex] + x) +1=0

9)5sin²x-2sinxcosx+cos²x=4
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