



 
Evan, I assume that you know the fact that Write tan(3x) as tan(2x + x) and then use the expression above to write tan(3x) in terms of tan(x) and tan(2x). Next write tan(2x) as tan(x + x) and use the expression above again to write tan(3x) in terms of tan(x). Simplify the expression. Harley  


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