SOLUTION: Solve this equation for {{{"[0,"}}}{{{2pi}}}{{{")"}}}: {{{Sin(4x)

SOLUTION: Solve this equation for {{{"[0,"}}}{{{2pi}}}{{{")"}}}: {{{Sin(4x) - Sin(2x)=0}}}

Question 335877: Solve this equation for :

Answer by Edwin McCravy(20063) (Show Source): You can put this solution on YOUR website!
Solve this equation for


Write  in the first term as   



Use the identity  with 
to replace the first term:



Factor out  on the left:



Set each factor on the left = 0



Notice that the coefficient of x is 2.
Since we want all values x in the interval
, we must find all values for 
2x in the interval 



So there are 8 solutions. 
  
Edwin

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