Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 5 - Trigonometric Functions - Chapter 5 Test Prep - Review Exercises - Page 559: 21

Answer

$\frac{5\sqrt {34}}{34}, \frac{3\sqrt {34}}{34}, \frac{5}{3}, \frac{3}{5}, \frac{\sqrt {34}}{3}, \frac{\sqrt {34}}{5}$

Work Step by Step

1. Graph $5x-3y=0, x\geq0$ and the least positive angle $\theta$ as shown. We can identify a point $(3,5)$ on the line. 2. $sin\theta=\frac{5}{\sqrt {(3)^2+(5)^2}}=\frac{5}{\sqrt {34}}=\frac{5\sqrt {34}}{34}$ 3. $cos\theta=\frac{3}{\sqrt {(3)^2+(5)^2}}=\frac{3}{\sqrt {34}}=\frac{3\sqrt {34}}{34}$ 4. $tan\theta=\frac{5}{3}$ 5. $cot\theta=\frac{1}{tan\theta}=\frac{3}{5}$ 6. $sec\theta=\frac{1}{cos\theta}=\frac{\sqrt {34}}{3}$ 7. $csc\theta=\frac{1}{sin\theta}=\frac{\sqrt {34}}{5}$
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