Verify the given linear approximation at a=0. Then use a graphing calculator or computer to determine the values of x for which the linear approximation is accurate to within 0.1.  4tan(x)=4x

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter4: Polynomial And Rational Functions
Section4.6: Variation
Problem 2E
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Verify the given linear approximation at a=0. Then use a graphing calculator or computer to determine the values of x for which the linear approximation is accurate to within 0.1. 

4tan(x)=4x

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