Explain the difference between sec(1/2) and cos -1 (1/2).  Make sure you use words to explain (you may also use some calculations to help explain).

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.5: Trigonometric Graphs
Problem 29E
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  1. Explain the difference between sec(1/2) and cos -1 (1/2).  Make sure you use words to explain (you may also use some calculations to help explain).
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