ПОМОГИТЕ ЗАВТРА ЗАЧЁТ!!

1)3tg x+6ctg x+11=0

2) 9cos x-5sin x-5=0

3) 10 cos^2 x-11sin x-4=0

4)2sin 2x+3sin ^2 x=0

5) 2 cos^2 x=1-sin x

6)sinx/3=cosx/3-1

 

 
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