Find all solutions to the equation in the interval [0, 2TT).
Cos x= sin 2x (1 point)
       
      
                
     
    
    
    
    
    1 answer:
            
              
              
                
                
You can use the formula for the double angle of the sine to write

To turn the equation into

Move everything to the left hand side to have

Factor  to have
 to have

A factor equals zero if and only if one of its factor equals zero. So, either

or

I assume that you have a table to lookup for these known values. If you have troubles solving for  , hit me up in the comments
, hit me up in the comments
 
                                
             
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