Fact 1: | arctan t<14 for any real number t. Fact 2: t <14 for any tE (-1, 1]. (a) Prove by using the triangle inequality that 2 arctan(2r) + ar|< (a +4)|r| if |r|S1. must indicate where you are using the triangle inequality in your solution. (b) Prove by using the definition of a limit that lim (2 arctan(2r) + ar) = 0.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section: Chapter Questions
Problem 22RE
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- Fact 1: arctan t<t for any real number t.
Fact 2: t < |4| for any tE (-1, 1].
(a) Prove by using the triangle inequality that |2 arctan(2r) +ar| < (a +4)|r| if |r| <1
must indicate where you are using the triangle inequality in your solution.
(b) Prove by using the definition of a limit that lim (2 arctan(2.r) + ar) 0.
Transcribed Image Text:- Fact 1: arctan t<t for any real number t. Fact 2: t < |4| for any tE (-1, 1]. (a) Prove by using the triangle inequality that |2 arctan(2r) +ar| < (a +4)|r| if |r| <1 must indicate where you are using the triangle inequality in your solution. (b) Prove by using the definition of a limit that lim (2 arctan(2.r) + ar) 0.
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