Calculus, 10th Edition (Anton)

Published by Wiley
ISBN 10: 0-47064-772-8
ISBN 13: 978-0-47064-772-1

Chapter 0 - Before Calculus - 0.4 Inverse Functions - Exercises Set 0.4 - Page 46: 35

Answer

$sin(\theta) = 0.8$ $cos(\theta) = 0.6 $ $cot(\theta) = 0.75$ $sec(\theta) = 1.66667$ $cosec(\theta) = 1.25$

Work Step by Step

We have $\theta = tan^{-1}(\frac{4}{3})$. (From this we get $tan(\theta) = \frac{4}{3}$) Thus, using a calculator, we have: $\theta = 53.13^{\circ} $. Thus, $sin(53.13) = 0.8 = \frac{4}{5}$ $cos(53.13) = 0.6 = \frac{3}{5}$ $cot(53.13) = \frac{1}{tan(53.13)} = \frac{1}{\frac{4}{3}} =\frac{3}{4} = 0.75$ $sec(53.13) = \frac{1}{cos(53.13)} = \frac{1}{\frac{3}{5}} = \frac{5}{3} = 1.66667$ $cosec(53.13) = \frac{1}{sin(53.13)} = \frac{1}{\frac{4}{5}} = \frac{5}{4} = 1.25$
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