Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 6 - Review - Exercises - Page 529: 53

Answer

$\sin \theta = \frac{\sqrt7}{4}$ $\cos \theta = \frac{3}{4}$ $\csc \theta = \frac{4\sqrt7}{7}$ $\cot \theta = \frac{3\sqrt7}{7}$

Work Step by Step

We have the following information : $\tan \theta = \frac{y}{x} = \frac{\sqrt7}{3}$ $\sec \theta = \frac{r}{x} = \frac{4}{3}$ It's clear, that : $x=3$ $y=\sqrt7$ $r=4$ So, the remaining $4$ trigonometric functions will be : $\sin \theta = \frac{y}{r} = \frac{\sqrt7}{4}$ $\cos \theta = \frac{x}{r} = \frac{3}{4}$ $\csc \theta = \frac{r}{y} = \frac{4}{\sqrt7}= \frac{4\sqrt7}{7}$ $\cot \theta = \frac{x}{y} = -\frac{3}{\sqrt7} = \frac{3\sqrt7}{7}$
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