Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 14 Trigonometric Graphs, Identities, and Equations - 14.6 Apply Sum and Difference Formulas - 14.6 Exercises - Skill Practice - Page 952: 31


$\dfrac{\tan x+1}{1-\tan x}$

Work Step by Step

In the given problem, the wrong formula is used because a mistake was made in the denominator. Now we will write the correct formula. $\tan (x+\dfrac{\pi}{4}) = \dfrac{\tan x+\tan \dfrac{\pi}{4}}{1-\tan x \tan \dfrac{\pi}{4}}$ or, $= \dfrac{\tan x+1}{1-\tan x}$
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