Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 6 - Trigonometric Functions - 6.2 Trigonometric Functions: Unit Circle Approach - 6.2 Assess Your Understanding - Page 378: 20

Answer

$sin(t) =-\frac{2}{3}$, $cos(t) =-\frac{\sqrt 5}{3}$, $tan(t) =\frac{2\sqrt 5}{5}$, $cot(t) =\frac{\sqrt 5}{2}$, $sec(t) =-\frac{3\sqrt 5}{5}$, $csc(t) =-\frac{3}{2}$.

Work Step by Step

Given $x=-\frac{\sqrt 5}{3}, y=-\frac{2}{3}, r=1$, we have: $sin(t)=y=-\frac{2}{3}$, $cos(t)=x=-\frac{\sqrt 5}{3}$, $tan(t)=\frac{y}{x}=\frac{2\sqrt 5}{5}$, $cot(t)=\frac{x}{y}=\frac{\sqrt 5}{2}$, $sec(t)=\frac{1}{x}=-\frac{3\sqrt 5}{5}$, $csc(t)=\frac{1}{y}=-\frac{3}{2}$.
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