Trigonometry 7th Edition

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

Chapter 1 - Section 1.3 - Definition I: Trigonometric Functions - 1.3 Problem Set - Page 32: 40


As the angle $\theta$ increases from $0^o$ to $90^o$, the value of $\cos{\theta}$ tends toward $0$.

Work Step by Step

From $0^o$ to $90^o$, the value of $\cos{\theta}$ decreases from $1$ to $0$. Thus, as $\theta$ increases from $0^o$ to $90^o$, the value of $cos{\theta}$ approaches $0$.
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