## Calculus 8th Edition

Published by Cengage

# Chapter 1 - Functions and Limits - 1.2 Mathematical Models: A Catalog of Essential Functions - 1.2 Exercises: 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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