Calculus: Early Transcendentals (2nd Edition)

Published by Pearson
ISBN 10: 0321947347
ISBN 13: 978-0-32194-734-5

Chapter 1 - Functions - 1.4 Trigonometric Functions and Their Inverse - 1.4 Exercises - Page 48: 23

Answer

$cos(0) =\boxed{1}$

Work Step by Step

We know that $cos(\theta) = \dfrac{base}{hypotenuse}$, but when $\theta = 0$, the base is equivalent to the hypotenuse, so $cos(0)= 1$.
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