   Chapter 8.3, Problem 13E

Chapter
Section
Textbook Problem

# Using Wallis's Formulas In Exercises 13–18, use Wallis’s Formulas to evaluate the integral. ∫ 0 π / 2 cos ⁡ 7 x   d x

To determine

To calculate: The value of integral 0π2cos7xdx using Walli’s formula.

Explanation

Given:

The provided expression is 0π2cos7xdx.

Formula used:

Wallis rule is:

0π2cosnxdx=(23)(45)(67)(n1n), if n is odd (n3).

0π2cosnxdx=(12)(34)(56)(n1n)(π2), if n is even (n2)

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