Pre Calculus
posted by Tyler .
Establish the following identity
tan(x+pi/4)=1+tanx/1tanx

Pre Calculus 
drwls
Use the tan (x + y) formula.
tan(x+y) = (tanx + tany)/(1  tanx tany)
with y = pi/4, tany = 1
Your right hand side should have parentheses
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