Approximate cos(91∘) by using a linear approximation of f(x)=cos(x) at x=π2. Give your answer rounded to four decimal places. For example, if you found cos(91∘)≈0.86612, you would enter 0.8661.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section: Chapter Questions
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Approximate cos(91∘) by using a linear approximation of f(x)=cos(x) at x=π2.

Give your answer rounded to four decimal places. For example, if you found cos(91∘)≈0.86612, you would enter 0.8661.

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