Trigonometry (10th Edition)

Published by Pearson
ISBN 10: 0321671775
ISBN 13: 978-0-32167-177-6

Chapter 1 - Trigonometric Functions - Section 1.3 Trigonometric Functions - 1.3 Exercises: 23



Work Step by Step

1. If cotangent is undefined, it means that it has a value of zero in its denominator $\cot\theta=\frac{a}{0}=undefined$ 2. Since tangent is the reciprocal of cotangent, when cotangent is undefined the tangent is zero, independent from a. $\tan\theta=\frac{0}{a}=0$
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