Question 1021352
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Find all solutions to the equation.
7 sin2x - 14 sin x + 2 = -5
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{{{7*sin^2(x) - 14*sin x + 2}}} = {{{-5}}}  --->  {{{7*sin^2(x) - 14*sin x + 7}}} = {{{0}}}  --->  {{{7*(sin^2(x) - 2*sin x + 1)}}} = {{{0}}}  --->  

{{{(sin^2(x) - 2*sin x + 1)}}} = {{{0}}}  --->  {{{(sin(x)-1)^2}}} = {{{0}}}}  --->  {{{sin(x)-1}}} = {{{0}}}  --->  sin(x) = 1  --->


x = {{{pi/2}}}  + {{{2*k*pi}}}, k = 0, +/-1, +/-2 . . . 
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