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Solve the equation on the interval [0,2π) .
−8cosx=3

Hello Guest!

  $−8cos(x)=3$                                 | $:(-8)$       

       $cos(x)=-\frac{3}{8}$                            

                $x=arccos(-0.375)$

                $x_1 = 1.955\\ x_2=4.328$

    !