1. 

   math_celebrity Administrator Staff Member

   sin(x)cot(x)
   
   We know that cot(x) = cos(x)/sin(x), so we rewrite this as:
   sin(x)cos(x)/sin(x)
   
   The sin(x) terms cancel and we get:
   cos(x)

    

   math_celebrity, Oct 20, 2021

   #1
   
   

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