6sin²x+sinxcosx-cos²x=2
6sin²x+sinxcosx-cos²x-2*1=0
6sin²x+sinxcosx-cos²x-2*(sin²x+cos²x)=0
4sin²x+sinxcosx-3cos²x=0 |:(сos²x)
4tg²x+tgx-3=0 , tgx=t
4t²+t-3=0 ,D=49 , t₁= 3/4 ,t₂=-1
tgx=3/4 ,x=arcctg(3/4)+πn,n∈Z
tgx=-1 ,x=arcctg(-1)+πn=-π/4+πn ,n∈Z
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6sin²x+sinxcosx-cos²x=2
6sin²x+sinxcosx-cos²x-2*1=0
6sin²x+sinxcosx-cos²x-2*(sin²x+cos²x)=0
4sin²x+sinxcosx-3cos²x=0 |:(сos²x)
4tg²x+tgx-3=0 , tgx=t
4t²+t-3=0 ,D=49 , t₁= 3/4 ,t₂=-1
tgx=3/4 ,x=arcctg(3/4)+πn,n∈Z
tgx=-1 ,x=arcctg(-1)+πn=-π/4+πn ,n∈Z