Trigonometry (11th Edition) Clone

Published by Pearson
ISBN 10: 978-0-13-421743-7
ISBN 13: 978-0-13421-743-7

Chapter 2 - Review Exercises - Page 94: 43

Answer

No, $\tan^{-1}$x is not the reciprocal of $\tan x.$ (It is the inverse of tan)

Work Step by Step

Entering $\tan^{-1}25^{o}$, the calculator returns 87.7093899574, which is the angle (in degrees) for which tan is 25. To check, enter $\tan($87.7093899574$)$.... result=25. To get $\cot 25^{o}$, he should have entered $(\tan 25)^{-1}$ or $1/\tan 25$ with the result : 2.14450692051 $\tan^{-1}$x is not the reciprocal of $\tan x.$ (It is the inverse of tan)
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.