Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 3 - Section 3.3 - Definition III: Circular Functions - 3.3 Problem Set - Page 145: 75



Work Step by Step

Step 1: Ensure that the calculator is in radian. Step 2: $\sec0.8=\frac{1}{\cos0.8}$ Step 3: Type $\frac{1}{\cos0.8}$ into the calculator and press enter. Step 4: Rounding out the answer to 4 decimal places, $\frac{1}{\cos0.8}\approx1.4353$
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