Question 987908
.
If 


1 = 10cos(x + 1) - 4, 


then


10cos(x+1) = 1 + 4 = 5, 


cos(x+1) = {{{5/10}}} = {{{1/2}}},


x+1 = +/- {{{(pi/3)}}} + {{{2k*pi}}}.


x = -1  +/- {{{(pi/3)}}} + {{{2k*pi}}}.


Due to the constrain &nbsp;0 < x < 1, &nbsp;the only solution is &nbsp;&nbsp;x = {{{pi/3-1}}}.