oneicyahdaley10
21.07.2019 •
Mathematics
50 points! find all solutions to the equation. cos2x + 2 cos x + 1 = 0
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Ответ:
x=π+2kπ,{k=0,±1,±2,±3,...}
Explanation:(cosx+1)2=cos2x+2cosx+1=0
then
cosx+1=0
Ответ:
why would you post that