Calculus: Early Transcendentals (2nd Edition)

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

Chapter 3 - Derivatives - 3.5 Derivatives of Trigonometric Functions - 3.5 Exercises - Page 169: 3


$tan(x) = \frac{sin(x)}{cos(x)}$ and $cot(x) = \frac{cos(x)}{sin(x)}$. We know the derivatives of the sine and cosine functions so it's more convenient to use quotient rule as opposed to using the definition of the derivative.

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