Calculus 8th Edition

by Stewart, James

Published by Cengage

ISBN 10: 1285740629

ISBN 13: 978-1-28574-062-1

Chapter 1 - Functions and Limits - 1.2 Mathematical Models: A Catalog of Essential Functions - 1.2 Exercises - Page 33: 6

Answer

x $\ne$ $\pi$/4 + k$\pi$, where k is any integer.

Work Step by Step

We must have: 1 - tan x $\ne$ 0. So, tan x $\ne$ 1. But, tan x = 1 for x = $\pi$/4 + k$\pi$, where k is any integer.

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