Explanation Given: Suppose f and g are functions. If f ( 0 ) = g ( 0 ) and f ′ ( x ) ≤ g ′ ( x ) for x ≥ 0 , then f ( x ) ≤ g ( x ) for all x ≥ 0 . Also, the inequality x ≤ tan x for 0 ≤ x < π 2 and inequality sin x ≤ x for x ≥ 0 are true. Calculation: Assume the function f ( x ) as shown below: f ( x ) = 1 − 1 2 x 2 ….. (1) Assume the function g ( x ) as shown below: g ( x ) = cos x ….. (2) Substitute 0 for x in equation(1) as shown below: f ( 0 ) = 1 − ( 1 2 ⋅ 0 ) = 1 Substitute 0 for x in equation (2) as shown below: g ( 0 ) = cos 0 = 1 Thus, the equality f ( 0 ) = g ( 0 ) holds true for the function f ( x ) = 1 − 1 2 x 2 and g ( x ) = cos x To determine (b) To show: The inequality sin x ≥ x − 1 6 x 3 holds for x ≥ 0 . To determine (c) To show: The inequality cos x ≤ 1 − 1 2 x 2 + 1 24 x 4 holds for x ≥ 0 .

4th Edition

ISBN: 9781319379421

Author: Rogawski

Publisher: MAC HIGHER

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Question

Chapter 4.3, Problem 75E

To determine

(a)

To show:

The inequality cosx≥1−12x2 holds for x≥0.

To determine

(b)

To show:

The inequality sinx≥x−16x3 holds for x≥0.

To determine

(c)

To show:

The inequality cosx≤1−12x2+124x4 holds for x≥0.

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Chapter 4.3, Problem 74E

Chapter 4.3, Problem 76E

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Chapter 4 Solutions

CALCULUS 4E (HC) W/ ACHIEVE ACCESS

Ch. 4.1 - Prob. 1PQ Ch. 4.1 - Prob. 2PQ Ch. 4.1 - Prob. 3PQ Ch. 4.1 - Prob. 4PQ Ch. 4.1 - Prob. 1E Ch. 4.1 - Prob. 2E Ch. 4.1 - Prob. 3E Ch. 4.1 - Prob. 4E Ch. 4.1 - Prob. 5E Ch. 4.1 - Prob. 6E

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Prob. 38E Ch. 4.7 - Prob. 39E Ch. 4.7 - Prob. 40E Ch. 4.7 - Prob. 41E Ch. 4.7 - Prob. 42E Ch. 4.7 - Prob. 43E Ch. 4.7 - Prob. 44E Ch. 4.7 - Prob. 45E Ch. 4.7 - Prob. 46E Ch. 4.7 - Prob. 47E Ch. 4.7 - Prob. 48E Ch. 4.7 - Prob. 49E Ch. 4.7 - Prob. 50E Ch. 4.7 - Prob. 51E Ch. 4.7 - Prob. 52E Ch. 4.7 - Prob. 53E Ch. 4.7 - Prob. 54E Ch. 4.7 - Prob. 55E Ch. 4.7 - Prob. 56E Ch. 4.7 - Prob. 57E Ch. 4.7 - Prob. 58E Ch. 4.7 - Prob. 59E Ch. 4.7 - Prob. 60E Ch. 4.7 - Prob. 61E Ch. 4.7 - Prob. 62E Ch. 4.7 - Prob. 63E Ch. 4.7 - Prob. 64E Ch. 4.7 - Prob. 65E Ch. 4.7 - Prob. 66E Ch. 4.7 - Prob. 67E Ch. 4.7 - Prob. 68E Ch. 4.7 - Prob. 69E Ch. 4.7 - Prob. 70E Ch. 4.7 - Prob. 71E Ch. 4.7 - Prob. 72E Ch. 4.7 - Prob. 73E Ch. 4.7 - Prob. 74E Ch. 4.7 - Prob. 75E Ch. 4.7 - Prob. 76E Ch. 4.7 - Prob. 77E Ch. 4.7 - Prob. 78E Ch. 4.7 - Prob. 79E Ch. 4.7 - Prob. 80E Ch. 4.7 - Prob. 81E Ch. 4.7 - Prob. 82E Ch. 4.8 - Prob. 1PQ Ch. 4.8 - Prob. 2PQ Ch. 4.8 - Prob. 3PQ Ch. 4.8 - Prob. 4PQ Ch. 4.8 - Prob. 1E Ch. 4.8 - Prob. 2E Ch. 4.8 - Prob. 3E Ch. 4.8 - Prob. 4E Ch. 4.8 - Prob. 5E Ch. 4.8 - Prob. 6E Ch. 4.8 - Prob. 7E Ch. 4.8 - Prob. 8E Ch. 4.8 - Prob. 9E Ch. 4.8 - Prob. 10E Ch. 4.8 - Prob. 11E Ch. 4.8 - Prob. 12E Ch. 4.8 - Prob. 13E Ch. 4.8 - Prob. 14E Ch. 4.8 - Prob. 15E Ch. 4.8 - Prob. 16E Ch. 4.8 - Prob. 17E Ch. 4.8 - Prob. 18E Ch. 4.8 - Prob. 19E Ch. 4.8 - Prob. 20E Ch. 4.8 - Prob. 21E Ch. 4.8 - Prob. 22E Ch. 4.8 - Prob. 23E Ch. 4.8 - Prob. 24E Ch. 4.8 - Prob. 25E Ch. 4.8 - Prob. 26E Ch. 4.8 - Prob. 27E Ch. 4.8 - Prob. 28E Ch. 4.8 - Prob. 29E Ch. 4.8 - Prob. 30E Ch. 4.8 - Prob. 31E Ch. 4.8 - Prob. 32E Ch. 4.8 - Prob. 33E Ch. 4.8 - Prob. 34E Ch. 4.8 - Prob. 35E Ch. 4.8 - Prob. 36E Ch. 4.8 - Prob. 37E Ch. 4.8 - Prob. 38E Ch. 4.8 - Prob. 39E Ch. 4.8 - Prob. 40E Ch. 4.8 - Prob. 41E Ch. 4 - Prob. 1CRE Ch. 4 - Prob. 2CRE Ch. 4 - Prob. 3CRE Ch. 4 - Prob. 4CRE Ch. 4 - Prob. 5CRE Ch. 4 - Prob. 6CRE Ch. 4 - Prob. 7CRE Ch. 4 - Prob. 8CRE Ch. 4 - Prob. 9CRE Ch. 4 - Prob. 10CRE Ch. 4 - Prob. 11CRE Ch. 4 - Prob. 12CRE Ch. 4 - Prob. 13CRE Ch. 4 - Prob. 14CRE Ch. 4 - Prob. 15CRE Ch. 4 - Prob. 16CRE Ch. 4 - Prob. 17CRE Ch. 4 - Prob. 18CRE Ch. 4 - Prob. 19CRE Ch. 4 - Prob. 20CRE Ch. 4 - Prob. 21CRE Ch. 4 - Prob. 22CRE Ch. 4 - Prob. 23CRE Ch. 4 - Prob. 24CRE Ch. 4 - Prob. 25CRE Ch. 4 - Prob. 26CRE Ch. 4 - Prob. 27CRE Ch. 4 - Prob. 28CRE Ch. 4 - Prob. 29CRE Ch. 4 - Prob. 30CRE Ch. 4 - Prob. 31CRE Ch. 4 - Prob. 32CRE Ch. 4 - Prob. 33CRE Ch. 4 - Prob. 34CRE Ch. 4 - Prob. 35CRE Ch. 4 - Prob. 36CRE Ch. 4 - Prob. 37CRE Ch. 4 - Prob. 38CRE Ch. 4 - Prob. 39CRE Ch. 4 - Prob. 40CRE Ch. 4 - Prob. 41CRE Ch. 4 - Prob. 42CRE Ch. 4 - Prob. 43CRE Ch. 4 - Prob. 44CRE Ch. 4 - Prob. 45CRE Ch. 4 - Prob. 46CRE Ch. 4 - Prob. 47CRE Ch. 4 - Prob. 48CRE Ch. 4 - Prob. 49CRE Ch. 4 - Prob. 50CRE Ch. 4 - Prob. 51CRE Ch. 4 - Prob. 52CRE Ch. 4 - Prob. 53CRE Ch. 4 - Prob. 54CRE Ch. 4 - Prob. 55CRE Ch. 4 - Prob. 56CRE Ch. 4 - Prob. 57CRE Ch. 4 - Prob. 58CRE Ch. 4 - Prob. 59CRE Ch. 4 - Prob. 60CRE Ch. 4 - Prob. 61CRE Ch. 4 - Prob. 62CRE Ch. 4 - Prob. 63CRE Ch. 4 - Prob. 64CRE Ch. 4 - Prob. 65CRE Ch. 4 - Prob. 66CRE Ch. 4 - Prob. 67CRE Ch. 4 - Prob. 68CRE Ch. 4 - Prob. 69CRE Ch. 4 - Prob. 70CRE Ch. 4 - Prob. 71CRE Ch. 4 - Prob. 72CRE Ch. 4 - Prob. 73CRE Ch. 4 - Prob. 74CRE Ch. 4 - Prob. 75CRE Ch. 4 - Prob. 76CRE Ch. 4 - Prob. 77CRE Ch. 4 - Prob. 78CRE Ch. 4 - Prob. 79CRE Ch. 4 - Prob. 80CRE Ch. 4 - Prob. 81CRE Ch. 4 - Prob. 82CRE Ch. 4 - Prob. 83CRE Ch. 4 - Prob. 84CRE Ch. 4 - Prob. 85CRE Ch. 4 - Prob. 86CRE Ch. 4 - Prob. 87CRE Ch. 4 - Prob. 88CRE Ch. 4 - Prob. 89CRE

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(a) To show: The inequality cos x ≥ 1 − 1 2 x 2 holds for x ≥ 0 .

Solution Summary: The author illustrates how the inequality mathrmcosxge 1-12

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(a)

To show:

The inequality cosx≥1−12x2 holds for x≥0.

(b)

To show:

The inequality sinx≥x−16x3 holds for x≥0.

(c)

To show:

The inequality cosx≤1−12x2+124x4 holds for x≥0.

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Chapter 4 Solutions

(a) To show: The inequality cos x ≥ 1 − 1 2 x 2 holds for x ≥ 0 .

Solution Summary: The author illustrates how the inequality mathrmcosxge 1-12

Concept explainers

Videos

(a) To show: The inequality cosx≥1−12x2 holds for x≥0.

(b) To show: The inequality sinx≥x−16x3 holds for x≥0.

(c) To show: The inequality cosx≤1−12x2+124x4 holds for x≥0.

Want to see the full answer?

Chapter 4 Solutions

(a)

To show:

The inequality cosx≥1−12x2 holds for x≥0.

(b)

To show:

The inequality sinx≥x−16x3 holds for x≥0.

(c)

To show:

The inequality cosx≤1−12x2+124x4 holds for x≥0.