Помогите решить, пожалуйста
cos^2x+sin x+1=0
6sin^x+5cosx-2=0
cosx+2cos2x=1
cos2x=2cox-1
4cosx=4-sin^2x
cos^2x+3sinx=3
cos^2x+sin x+1=0
6sin^x+5cosx-2=0
cosx+2cos2x=1
cos2x=2cox-1
4cosx=4-sin^2x
cos^2x+3sinx=3
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