Seudónimo Seudónimo
  • 05-05-2018
  • Mathematics
contestada

50 POINTS!

Find all solutions to the equation.

cos2x + 2 cos x + 1 = 0

Respuesta :

riyanandola
riyanandola riyanandola
  • 05-05-2018
Answer:

x=π+2kπ,{k=0,±1,±2,±3,...}

Explanation:

(cosx+1)2=cos2x+2cosx+1=0

then

cosx+1=0

Answer Link
ASIAX
ASIAX ASIAX
  • 13-07-2018

Hi there!


Solve the rational equation by combining expressions and isolating the variable x.


Doing this would result in:


[tex] \mathfrak{cos (x) = - \dfrac{1}{2} - \dfrac{cos (2x)}{2} } [/tex]


[tex] \mathfrak{ASIAX} [/tex]

Answer Link

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