briscosarg19 briscosarg19

12-02-2018
Mathematics

contestada

Solve the equation for all values of x. Not really sure how to do this?

cos x = 3*cos x - 2

Respuesta :

jdoe0001 jdoe0001

12-02-2018

[tex]\bf cos(x)=3cos(x)-2\implies 0=3cos(x)-2-cos(x) \\\\\\ 0=2cos(x)-2\implies 2=2cos(x)\implies \cfrac{2}{2}=cos(x)\implies 1=cos(x) \\\\\\ cos^{-1}(1)=\measuredangle x\implies \measuredangle x= \begin{cases} 0\\ 2\pi \end{cases}[/tex]

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