Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 4 - Section 4.1 - Basic Graphs - 4.1 Problem Set - Page 192: 10

Answer

tangent, cotangent

Work Step by Step

Only tangent and cotangent functions have period of $\pi$. This is because tan and cot are the only functions which are positive in both the 1st and 3rd quadrants. The rest does not have a period of $\pi$.
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