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tamikeen9301
18.06.2021 •
Mathematics
Find all solutions to the equation.
cos^2 x +2cosx+1=0
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Ответ:
Step-by-step explanation:
Let![u= \cos x](/tpl/images/1378/4395/c9564.png)
Then![u^2+2u+1=(u+1)^2=0](/tpl/images/1378/4395/18055.png)
or
This gives us
or all integer multiples of ![\pi (n \pi)](/tpl/images/1378/4395/76a8d.png)
Ответ:
in 6 weeks
Step-by-step explanation: