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Asked by Tyler

Establish the following identity

tan(x+pi/4)=1+tanx/1-tanx
15 years ago

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Answered by 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
15 years ago
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Establish the following identity

tan(x+pi/4)=1+tanx/1-tanx

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