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solve for x.

thanks

 Mar 11, 2019
 #1
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sin (5x - 9)  = cos (10x - 6)

 

Note that, because they are co-functions,    (5x - 9) + (10 x - 6)  = 90      simplify

 

15x - 15  =  90     add 15 to both sides

 

15x  = 105    divide both sides by  15

 

x = 7  

 

cool cool cool

 Mar 11, 2019

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