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 Nov 20, 2020
 #1
avatar+11086 
+2

Write the sum as a produkt.

\(sin(x)-sin(2x)\)

 

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\(sin(x)-sin(2x)\\ =sin(x)-2sin(x)cos(x)\\ \color{blue}=sin(x)(1-2cos(x))\)

laugh  !

 Nov 20, 2020

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